[Alapin's opening]
ECO=C20
A1H8=e2e4 e7e5 g1e2
PGN=1. e4 e5 2. Ne2
BASIC=False
[Alekhine's defence]
ECO=B02
A1H8=e2e4 g8f6
PGN=1. e4 Nf6
BASIC=True
[Alekhine's defence: Balogh variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 f1c4
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Bc4
BASIC=False
[Alekhine's defence: Brooklyn defence]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6g8
PGN=1. e4 Nf6 2. e5 Ng8
BASIC=False
[Alekhine's defence: Kmoch variation]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6d5 f1c4 d5b6 c4b3 c7c5 d2d3
PGN=1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 c5 5. d3
BASIC=False
[Alekhine's defence: Krejcik variation]
ECO=B02
A1H8=e2e4 g8f6 f1c4
PGN=1. e4 Nf6 2. Bc4
BASIC=False
[Alekhine's defence: Maroczy variation]
ECO=B02
A1H8=e2e4 g8f6 d2d3
PGN=1. e4 Nf6 2. d3
BASIC=False
[Alekhine's defence: Mokele Mbembe (Buecker) variation]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6e4
PGN=1. e4 Nf6 2. e5 Ne4
BASIC=False
[Alekhine's defence: O'Sullivan gambit]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 b7b5
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 b5
BASIC=False
[Alekhine's defence: Saemisch attack]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6d5 b1c3
PGN=1. e4 Nf6 2. e5 Nd5 3. Nc3
BASIC=False
[Alekhine's defence: Scandinavian variation]
ECO=B02
A1H8=e2e4 g8f6 b1c3 d7d5
PGN=1. e4 Nf6 2. Nc3 d5
BASIC=False
[Alekhine's defence: Spielmann variation]
ECO=B02
A1H8=e2e4 g8f6 b1c3 d7d5 e4e5 f6d7 e5e6
PGN=1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. e6
BASIC=False
[Alekhine's defence: Steiner variation]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 b2b3
PGN=1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. b3
BASIC=False
[Alekhine's defence: Welling variation]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6d5 b2b3
PGN=1. e4 Nf6 2. e5 Nd5 3. b3
BASIC=False
[Alekhine's defence: exchange variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6
BASIC=False
[Alekhine's defence: exchange, Karpov variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6 c7d6 g1f3 g7g6 f1e2 f8g7 e1g1 e8g8 h2h3 b8c6 b1c3 c8f5 c1f4
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nf3 g6 7. Be2 Bg7 8. O-O O-O 9. h3 Nc6 10. Nc3 Bf5 11. Bf4
BASIC=False
[Alekhine's defence: four pawns attack]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4
BASIC=False
[Alekhine's defence: four pawns attack, 6...Nc6]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6
BASIC=False
[Alekhine's defence: four pawns attack, 7.Be3]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3
BASIC=False
[Alekhine's defence: four pawns attack, Ilyin-Genevsky var.]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 g1f3 c8g4 e5e6 f7e6 c4c5
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Nf3 Bg4 8. e6 fxe6 9. c5
BASIC=False
[Alekhine's defence: four pawns attack, Korchnoi variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 c8f5 b1c3 e7e6 g1f3 f8e7 f1e2 e8g8 e1g1 f7f6
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Be7 9. Be2 O-O 10. O-O f6
BASIC=False
[Alekhine's defence: four pawns attack, Planinc variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g5
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g5
BASIC=False
[Alekhine's defence: four pawns attack, Tartakower variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3 c8f5 b1c3 e7e6 g1f3 d8d7 f1e2 e8c8 e1g1 f8e7
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Qd7 10. Be2 O-O-O 11. O-O Be7
BASIC=False
[Alekhine's defence: four pawns attack, Trifunovic variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 c8f5
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 Bf5
BASIC=False
[Alekhine's defence: four pawns attack, fianchetto variation]
ECO=B03
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g6
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g6
BASIC=False
[Alekhine's defence: modern variation]
ECO=B04
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3
BASIC=False
[Alekhine's defence: modern variation, 4...Bg4]
ECO=B05
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4
BASIC=False
[Alekhine's defence: modern, Alekhine variation]
ECO=B05
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 c2c4
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4
BASIC=False
[Alekhine's defence: modern, Flohr variation]
ECO=B05
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 f1e2 c7c6
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6
BASIC=False
[Alekhine's defence: modern, Keres variation]
ECO=B04
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 g7g6 f1c4 d5b6 c4b3 f8g7 a2a4
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. a4
BASIC=False
[Alekhine's defence: modern, Larsen variation]
ECO=B04
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 d6e5
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5
BASIC=False
[Alekhine's defence: modern, Panov variation]
ECO=B05
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 h2h3
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. h3
BASIC=False
[Alekhine's defence: modern, Schmid variation]
ECO=B04
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 d5b6
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nb6
BASIC=False
[Alekhine's defence: modern, Vitolins attack]
ECO=B05
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 c2c4 d5b6 d4d5
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4 Nb6 6. d5
BASIC=False
[Alekhine's defence: modern, fianchetto variation]
ECO=B04
A1H8=e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 g7g6
PGN=1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6
BASIC=False
[Alekhine's defence: two pawns' (Lasker's) attack]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5
PGN=1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5
BASIC=False
[Alekhine's defence: two pawns' attack, Mikenas variation]
ECO=B02
A1H8=e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3 d7d6
PGN=1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6
BASIC=False
[Amar (Paris) opening]
ECO=A00
A1H8=g1h3
PGN=1. Nh3
BASIC=False
[Amar gambit]
ECO=A00
A1H8=g1h3 d7d5 g2g3 e7e5 f2f4 c8h3 f1h3 e5f4
PGN=1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4
BASIC=False
[Amsterdam attack]
ECO=A00
A1H8=e2e3 e7e5 c2c4 d7d6 b1c3 b8c6 b2b3 g8f6
PGN=1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6
BASIC=False
[Anderssen's opening]
ECO=A00
A1H8=a2a3
PGN=1. a3
BASIC=False
[Anti-Borg (Desprez) opening]
ECO=A00
A1H8=h2h4
PGN=1. h4
BASIC=False
[Barnes defence]
ECO=B00
A1H8=e2e4 f7f6
PGN=1. e4 f6
BASIC=False
[Battambang opening]
ECO=A00
A1H8=b1c3 e7e5 a2a3
PGN=1. Nc3 e5 2. a3
BASIC=False
[Beefeater defence]
ECO=A40
A1H8=d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 g7c3 b2c3 f7f5
PGN=1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5
BASIC=False
[Benko gambit]
ECO=A57
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5
BASIC=True
[Benko gambit accepted]
ECO=A58
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6
BASIC=False
[Benko gambit half accepted]
ECO=A57
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6
BASIC=False
[Benko gambit: 7.e4]
ECO=A59
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 e2e4
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4
BASIC=False
[Benko gambit: Nd2 variation]
ECO=A58
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 g1f3 g7g6 f3d2
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. Nd2
BASIC=False
[Benko gambit: Ne2 variation]
ECO=A59
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 e2e4 a6f1 e1f1 g7g6 g1e2
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8. Kxf1 g6 9. Nge2
BASIC=False
[Benko gambit: Nescafe Frappe attack]
ECO=A57
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3 a6b5 e2e4 b5b4 c3b5 d7d6 f1c4
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bc4
BASIC=False
[Benko gambit: Zaitsev system]
ECO=A57
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3
BASIC=False
[Benko gambit: fianchetto variation]
ECO=A58
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 g1f3 g7g6 g2g3
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. g3
BASIC=False
[Benko gambit: main line]
ECO=A59
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 e2e4 a6f1 e1f1 g7g6 g2g3 f8g7 f1g2 e8g8 g1f3
PGN=1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8. Kxf1 g6 9. g3 Bg7 10. Kg2 O-O 11. Nf3
BASIC=False
[Benko's opening]
ECO=A00
A1H8=g2g3
PGN=1. g3
BASIC=False
[Benko's opening: reversed Alekhine]
ECO=A00
A1H8=g2g3 e7e5 g1f3
PGN=1. g3 e5 2. Nf3
BASIC=False
[Benoni defence]
ECO=A56
A1H8=d2d4 g8f6 c2c4 c7c5
PGN=1. d4 Nf6 2. c4 c5
BASIC=True
[Benoni defence, Hromodka system]
ECO=A56
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 d7d6
PGN=1. d4 Nf6 2. c4 c5 3. d5 d6
BASIC=False
[Benoni: 6.e4]
ECO=A65
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4
BASIC=False
[Benoni: Mikenas variation]
ECO=A66
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 e4e5
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. e5
BASIC=False
[Benoni: Nimzovich (knight's tour) variation]
ECO=A61
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 g1f3 g7g6 f3d2
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2
BASIC=False
[Benoni: Taimanov variation]
ECO=A67
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 f1b5
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+
BASIC=False
[Benoni: Uhlmann variation]
ECO=A61
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 g1f3 g7g6 c1g5
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Bg5
BASIC=False
[Benoni: classical with ...Re8 and ...Na6]
ECO=A78
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6
BASIC=False
[Benoni: classical with ...a6 and 10...Bg4]
ECO=A75
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4 c8g4
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4
BASIC=False
[Benoni: classical with e4 and Nf3]
ECO=A70
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3
BASIC=False
[Benoni: classical without 9.O-O]
ECO=A70
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2
BASIC=False
[Benoni: classical, 11.f3]
ECO=A79
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6 f2f3
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 11. f3
BASIC=False
[Benoni: classical, 8.Bg5]
ECO=A71
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 c1g5
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Bg5
BASIC=False
[Benoni: classical, 9...Re8]
ECO=A76
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8
BASIC=False
[Benoni: classical, 9...Re8, 10.Nd2]
ECO=A77
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2
BASIC=False
[Benoni: classical, 9...a6, 10.a4]
ECO=A74
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O a6 10. a4
BASIC=False
[Benoni: classical, 9.O-O]
ECO=A73
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O
BASIC=False
[Benoni: fianchetto variation]
ECO=A61
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 g1f3 g7g6 g2g3
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3
BASIC=False
[Benoni: fianchetto, 11...Re8]
ECO=A64
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 g1f3 g7g6 g2g3 f8g7 f1g2 e8g8 e1g1 b8d7 f3d2 a7a6 a2a4 f8e8
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O Nbd7 10. Nd2 a6 11. a4 Re8
BASIC=False
[Benoni: fianchetto, 9...Nbd7]
ECO=A63
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 g1f3 g7g6 g2g3 f8g7 f1g2 e8g8 e1g1 b8d7
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O Nbd7
BASIC=False
[Benoni: four pawns attack]
ECO=A68
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O
BASIC=False
[Benoni: four pawns attack, main line]
ECO=A69
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8 f1e2 f8e8
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 9. Be2 Re8
BASIC=False
[Benoni: pawn storm variation]
ECO=A66
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4
PGN=1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4
BASIC=False
[Bird's opening]
ECO=A02
A1H8=f2f4
PGN=1. f4
BASIC=False
[Bird's opening, Swiss gambit]
ECO=A02
A1H8=f2f4 f7f5 e2e4 f5e4 b1c3 g8f6 g2g4
PGN=1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
BASIC=False
[Bird's opening: Lasker variation]
ECO=A03
A1H8=f2f4 d7d5 g1f3 g8f6 e2e3 c7c5
PGN=1. f4 d5 2. Nf3 Nf6 3. e3 c5
BASIC=False
[Bird's opening: Williams gambit]
ECO=A03
A1H8=f2f4 d7d5 e2e4
PGN=1. f4 d5 2. e4
BASIC=False
[Bird: From gambit]
ECO=A02
A1H8=f2f4 e7e5
PGN=1. f4 e5
BASIC=False
[Bird: From gambit, Lasker variation]
ECO=A02
A1H8=f2f4 e7e5 f4e5 d7d6 e5d6 f8d6 g1f3 g7g5
PGN=1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5
BASIC=False
[Bird: From gambit, Lipke variation]
ECO=A02
A1H8=f2f4 e7e5 f4e5 d7d6 e5d6 f8d6 g1f3 g8h6 d2d4
PGN=1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4
BASIC=False
[Bird: Hobbs gambit]
ECO=A02
A1H8=f2f4 g7g5
PGN=1. f4 g5
BASIC=False
[Bishop's opening]
ECO=C23
A1H8=e2e4 e7e5 f1c4
PGN=1. e4 e5 2. Bc4
BASIC=False
[Bishop's opening: Berlin defence]
ECO=C24
A1H8=e2e4 e7e5 f1c4 g8f6
PGN=1. e4 e5 2. Bc4 Nf6
BASIC=False
[Bishop's opening: Calabrese counter-gambit]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f7f5
PGN=1. e4 e5 2. Bc4 f5
BASIC=False
[Bishop's opening: Calabrese counter-gambit, Jaenisch variation]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f7f5 d2d3
PGN=1. e4 e5 2. Bc4 f5 3. d3
BASIC=False
[Bishop's opening: Classical variation]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5
PGN=1. e4 e5 2. Bc4 Bc5
BASIC=False
[Bishop's opening: Four pawns' gambit]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 f2f4 e5f4 g1f3 b4e7 d2d4 e7h4 g2g3 f4g3 e1g1 g3h2 g1h1
PGN=1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 exf4 5. Nf3 Be7 6. d4 Bh4+ 7. g3 fxg3 8. O-O gxh2+ 9. Kh1
BASIC=False
[Bishop's opening: Greco gambit]
ECO=C24
A1H8=e2e4 e7e5 f1c4 g8f6 f2f4
PGN=1. e4 e5 2. Bc4 Nf6 3. f4
BASIC=False
[Bishop's opening: Lewis counter-gambit]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 c2c3 d7d5
PGN=1. e4 e5 2. Bc4 Bc5 3. c3 d5
BASIC=False
[Bishop's opening: Lewis gambit]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 d2d4
PGN=1. e4 e5 2. Bc4 Bc5 3. d4
BASIC=False
[Bishop's opening: Lisitsyn variation]
ECO=C23
A1H8=e2e4 e7e5 f1c4 c7c6 d2d4 d7d5 e4d5 c6d5 c4b5 c8d7 b5d7 b8d7 d4e5 d7e5 g1e2
PGN=1. e4 e5 2. Bc4 c6 3. d4 d5 4. exd5 cxd5 5. Bb5+ Bd7 6. Bxd7+ Nxd7 7. dxe5 Nxe5 8. Ne2
BASIC=False
[Bishop's opening: Lopez gambit]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 d1e2 b8c6 c2c3 g8f6 f2f4
PGN=1. e4 e5 2. Bc4 Bc5 3. Qe2 Nc6 4. c3 Nf6 5. f4
BASIC=False
[Bishop's opening: MacDonnell double gambit]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 f2f4
PGN=1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4
BASIC=False
[Bishop's opening: Philidor counter-attack]
ECO=C23
A1H8=e2e4 e7e5 f1c4 c7c6
PGN=1. e4 e5 2. Bc4 c6
BASIC=False
[Bishop's opening: Philidor variation]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 c2c3
PGN=1. e4 e5 2. Bc4 Bc5 3. c3
BASIC=False
[Bishop's opening: Ponziani gambit]
ECO=C24
A1H8=e2e4 e7e5 f1c4 g8f6 d2d4
PGN=1. e4 e5 2. Bc4 Nf6 3. d4
BASIC=False
[Bishop's opening: Pratt variation]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e4e5 d7d5 e5f6 d5c4 d1h5 e8g8
PGN=1. e4 e5 2. Bc4 Bc5 3. c3 Nf6 4. d4 exd4 5. e5 d5 6. exf6 dxc4 7. Qh5 O-O
BASIC=False
[Bishop's opening: Urusov gambit]
ECO=C24
A1H8=e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3
PGN=1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3
BASIC=False
[Bishop's opening: Urusov gambit, Panov variation]
ECO=C24
A1H8=e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3 d7d5 e4d5 f8b4 c2c3 d8e7
PGN=1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 d5 5. exd5 Bb4+ 6. c3 Qe7+
BASIC=False
[Bishop's opening: Wing gambit]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 b2b4
PGN=1. e4 e5 2. Bc4 Bc5 3. b4
BASIC=False
[Bishop's opening: del Rio variation]
ECO=C23
A1H8=e2e4 e7e5 f1c4 f8c5 c2c3 d8g5
PGN=1. e4 e5 2. Bc4 Bc5 3. c3 Qg5
BASIC=False
[Blackburne shilling gambit]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 c6d4 f3e5 d8g5 e5f7 g5g2 h1f1 g2e4 c4e2 d4f3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nd4 4. Nxe5 Qg5 5. Nxf7 Qxg2 6. Rf1 Qxe4+ 7. Be2 Nf3#
BASIC=False
[Blackmar gambit]
ECO=D00
A1H8=d2d4 d7d5 e2e4
PGN=1. d4 d5 2. e4
BASIC=False
[Blackmar-Diemer gambit]
ECO=A45
A1H8=d2d4 g8f6 f2f3 d7d5 e2e4
PGN=1. d4 Nf6 2. f3 d5 3. e4
BASIC=False
[Blackmar-Diemer: Euwe defence]
ECO=D00
A1H8=d2d4 d7d5 b1c3 g8f6 e2e4 d5e4 f2f3 e4f3 g1f3 e7e6
PGN=1. d4 d5 2. Nc3 Nf6 3. e4 dxe4 4. f3 exf3 5. Nxf3 e6
BASIC=False
[Blackmar-Diemer: Lemberg counter-gambit]
ECO=D00
A1H8=d2d4 d7d5 b1c3 g8f6 e2e4 e7e5
PGN=1. d4 d5 2. Nc3 Nf6 3. e4 e5
BASIC=False
[Blumenfeld counter-gambit]
ECO=E10
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5
BASIC=False
[Blumenfeld counter-gambit accepted]
ECO=E10
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 d5e6 f7e6 c4b5 d7d5
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5
BASIC=False
[Blumenfeld counter-gambit, Dus-Chotimursky variation]
ECO=E10
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 c1g5
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5
BASIC=False
[Blumenfeld counter-gambit, Spielmann variation]
ECO=E10
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 c1g5 e6d5 c4d5 h7h6
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 exd5 6. cxd5 h6
BASIC=False
[Boden-Kieseritsky gambit]
ECO=C27
A1H8=e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 g1f3
PGN=1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Nf3
BASIC=False
[Boden-Kieseritsky gambit: Lichtenhein defence]
ECO=C27
A1H8=e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 g1f3 d7d5
PGN=1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Nf3 d5
BASIC=False
[Bogo-Indian defence]
ECO=E11
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 f8b4
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+
BASIC=False
[Bogo-Indian defence, Gruenfeld variation]
ECO=E11
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 b1d2
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2
BASIC=False
[Bogo-Indian defence, Monticelli trap]
ECO=E11
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 b4d2 d1d2 b7b6 g2g3 c8b7 f1g2 e8g8 b1c3 f6e4 d2c2 e4c3 f3g5
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Bxd2+ 5. Qxd2 b6 6. g3 Bb7 7. Bg2 O-O 8. Nc3 Ne4 9. Qc2 Nxc3 10. Ng5
BASIC=False
[Bogo-Indian defence, Nimzovich variation]
ECO=E11
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 d8e7
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7
BASIC=False
[Budapest defence]
ECO=A52
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6g4
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ng4
BASIC=False
[Budapest defence declined]
ECO=A51
A1H8=d2d4 g8f6 c2c4 e7e5
PGN=1. d4 Nf6 2. c4 e5
BASIC=False
[Budapest: Adler variation]
ECO=A52
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 g1f3
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3
BASIC=False
[Budapest: Alekhine variation]
ECO=A52
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4
BASIC=False
[Budapest: Alekhine variation, Balogh gambit]
ECO=A52
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4 d7d6
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6
BASIC=False
[Budapest: Alekhine, Abonyi variation]
ECO=A52
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4 g4e5 f2f4 e5c6
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Nec6
BASIC=False
[Budapest: Fajarowicz variation]
ECO=A51
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6e4
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ne4
BASIC=False
[Budapest: Fajarowicz, Steiner variation]
ECO=A51
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6e4 d1c2
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Qc2
BASIC=False
[Budapest: Rubinstein variation]
ECO=A52
A1H8=d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 c1f4
PGN=1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4
BASIC=False
[Canard opening]
ECO=A45
A1H8=d2d4 g8f6 f2f4
PGN=1. d4 Nf6 2. f4
BASIC=False
[Caro-Kann defence]
ECO=B10
A1H8=e2e4 c7c6
PGN=1. e4 c6
BASIC=False
[Caro-Kann: 3.Nd2]
ECO=B12
A1H8=e2e4 c7c6 d2d4 d7d5 b1d2
PGN=1. e4 c6 2. d4 d5 3. Nd2
BASIC=False
[Caro-Kann: Alekhine gambit]
ECO=B15
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 f1d3
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Bd3
BASIC=False
[Caro-Kann: Bronstein-Larsen variation]
ECO=B16
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 g7f6
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6
BASIC=False
[Caro-Kann: Edinburgh variation]
ECO=B12
A1H8=e2e4 c7c6 d2d4 d7d5 b1d2 d8b6
PGN=1. e4 c6 2. d4 d5 3. Nd2 Qb6
BASIC=False
[Caro-Kann: Forgacs variation]
ECO=B15
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 e7f6 f1c4
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Bc4
BASIC=False
[Caro-Kann: Goldman (Spielmann) variation]
ECO=B10
A1H8=e2e4 c7c6 b1c3 d7d5 d1f3
PGN=1. e4 c6 2. Nc3 d5 3. Qf3
BASIC=False
[Caro-Kann: Gurgenidze counter-attack]
ECO=B15
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 b7b5
PGN=1. e4 c6 2. d4 d5 3. Nc3 b5
BASIC=False
[Caro-Kann: Gurgenidze system]
ECO=B15
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 g7g6
PGN=1. e4 c6 2. d4 d5 3. Nc3 g6
BASIC=False
[Caro-Kann: Hillbilly attack]
ECO=B10
A1H8=e2e4 c7c6 f1c4
PGN=1. e4 c6 2. Bc4
BASIC=False
[Caro-Kann: Panov-Botvinnik attack]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4
BASIC=False
[Caro-Kann: Panov-Botvinnik attack, 5...e6]
ECO=B14
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 e7e6
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6
BASIC=False
[Caro-Kann: Panov-Botvinnik attack, 5...g6]
ECO=B14
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 g7g6
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6
BASIC=False
[Caro-Kann: Panov-Botvinnik, Czerniak variation]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d8a5
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qa5
BASIC=False
[Caro-Kann: Panov-Botvinnik, Gunderam attack]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 c4c5
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. c5
BASIC=False
[Caro-Kann: Panov-Botvinnik, Herzog defence]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d5c4 d4d5 c6a5
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 dxc4 7. d5 Na5
BASIC=False
[Caro-Kann: Panov-Botvinnik, Reifir (Spielmann) variation]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d8b6
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qb6
BASIC=False
[Caro-Kann: Panov-Botvinnik, normal variation]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 e7e6
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 e6
BASIC=False
[Caro-Kann: Rasa-Studier gambit]
ECO=B15
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 f2f3
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3
BASIC=False
[Caro-Kann: Steinitz variation]
ECO=B17
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7
BASIC=False
[Caro-Kann: Tartakower (Nimzovich) variation]
ECO=B15
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 e7f6
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6
BASIC=False
[Caro-Kann: Tartakower (fantasy) variation]
ECO=B12
A1H8=e2e4 c7c6 d2d4 d7d5 f2f3
PGN=1. e4 c6 2. d4 d5 3. f3
BASIC=False
[Caro-Kann: advance variation]
ECO=B12
A1H8=e2e4 c7c6 d2d4 d7d5 e4e5
PGN=1. e4 c6 2. d4 d5 3. e5
BASIC=False
[Caro-Kann: advance, Short variation]
ECO=B12
A1H8=e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 c2c3 e7e6 f1e2
PGN=1. e4 c6 2. d4 d5 3. e5 Bf5 4. c3 e6 5. Be2
BASIC=False
[Caro-Kann: anti-Caro-Kann defence]
ECO=B10
A1H8=e2e4 c7c6 c2c4
PGN=1. e4 c6 2. c4
BASIC=False
[Caro-Kann: anti-anti-Caro-Kann defence]
ECO=B10
A1H8=e2e4 c7c6 c2c4 d7d5
PGN=1. e4 c6 2. c4 d5
BASIC=False
[Caro-Kann: classical variation]
ECO=B18
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 c8f5
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5
BASIC=False
[Caro-Kann: classical, 6.h4]
ECO=B18
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 c8f5 e4g3 f5g6 h2h4
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4
BASIC=False
[Caro-Kann: classical, 7...Nd7]
ECO=B19
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7
BASIC=False
[Caro-Kann: classical, Flohr variation]
ECO=B18
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 c8f5 e4g3 f5g6 g1h3
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nh3
BASIC=False
[Caro-Kann: classical, Maroczy attack]
ECO=B18
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 c8f5 e4g3 f5g6 f2f4
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. f4
BASIC=False
[Caro-Kann: classical, Spassky variation]
ECO=B19
A1H8=e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5
PGN=1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5
BASIC=False
[Caro-Kann: closed (Breyer) variation]
ECO=B10
A1H8=e2e4 c7c6 d2d3
PGN=1. e4 c6 2. d3
BASIC=False
[Caro-Kann: exchange variation]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5
PGN=1. e4 c6 2. d4 d5 3. exd5
BASIC=False
[Caro-Kann: exchange, Rubinstein variation]
ECO=B13
A1H8=e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 f1d3 b8c6 c2c3 g8f6 c1f4
PGN=1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4
BASIC=False
[Caro-Kann: two knights variation]
ECO=B10
A1H8=e2e4 c7c6 b1c3 d7d5 g1f3
PGN=1. e4 c6 2. Nc3 d5 3. Nf3
BASIC=False
[Caro-Kann: two knights, 3...Bg4]
ECO=B11
A1H8=e2e4 c7c6 b1c3 d7d5 g1f3 c8g4
PGN=1. e4 c6 2. Nc3 d5 3. Nf3 Bg4
BASIC=False
[Caro-Masi defence]
ECO=B12
A1H8=e2e4 c7c6 d2d4 g8f6
PGN=1. e4 c6 2. d4 Nf6
BASIC=False
[Carr's defence]
ECO=B00
A1H8=e2e4 h7h6
PGN=1. e4 h6
BASIC=False
[Catalan opening]
ECO=E00
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3
PGN=1. d4 Nf6 2. c4 e6 3. g3
BASIC=False
[Catalan: closed]
ECO=E01
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2
BASIC=False
[Catalan: closed, 5.Nf3]
ECO=E06
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3
BASIC=False
[Catalan: closed, 6...Nbd7]
ECO=E07
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7
BASIC=False
[Catalan: closed, 7.Qc2]
ECO=E08
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2
BASIC=False
[Catalan: closed, Botvinnik variation]
ECO=E07
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 b1c3 c7c6 d1d3
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Nc3 c6 8. Qd3
BASIC=False
[Catalan: closed, Qc2 & b3]
ECO=E08
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3
BASIC=False
[Catalan: closed, Sokolsky variation]
ECO=E09
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2 b7b6 b2b3 a7a5 c1b2 c8a6
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6 9. b3 a5 10. Bb2 Ba6
BASIC=False
[Catalan: closed, Spassky gambit]
ECO=E08
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3 b7b6 f1d1 c8b7 b1c3 b6b5
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 b6 9. Rd1 Bb7 10. Nc3 b5
BASIC=False
[Catalan: closed, Zagoryansky variation]
ECO=E08
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 f1d1 b7b6 a2a4
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Rd1 b6 9. a4
BASIC=False
[Catalan: closed, main line]
ECO=E09
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2
BASIC=False
[Catalan: open, 5.Nf3]
ECO=E04
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3
BASIC=False
[Catalan: open, 5.Qa4]
ECO=E02
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 d1a4
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+
BASIC=False
[Catalan: open, 5.Qa4 Nbd7, 6.Qxc4]
ECO=E03
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 d1a4 b8d7 a4c4
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4
BASIC=False
[Catalan: open, Alekhine variation]
ECO=E03
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 d1a4 b8d7 a4c4 a7a6 c4c2
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2
BASIC=False
[Catalan: open, classical line]
ECO=E05
A1H8=d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3 f8e7
PGN=1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7
BASIC=False
[Centre game]
ECO=C21
A1H8=e2e4 e7e5 d2d4 e5d4
PGN=1. e4 e5 2. d4 exd4
BASIC=True
[Centre game, Kieseritsky variation]
ECO=C21
A1H8=e2e4 e7e5 d2d4 e5d4 g1f3 c7c5 f1c4 b7b5
PGN=1. e4 e5 2. d4 exd4 3. Nf3 c5 4. Bc4 b5
BASIC=False
[Centre game: Berger variation]
ECO=C22
A1H8=e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 g8f6
PGN=1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6
BASIC=False
[Centre game: Charousek variation]
ECO=C22
A1H8=e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 f8b4 c2c3 b4e7
PGN=1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Bb4+ 5. c3 Be7
BASIC=False
[Centre game: Hall variation]
ECO=C22
A1H8=e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4c4
PGN=1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc4
BASIC=False
[Centre game: Kupreichik variation]
ECO=C22
A1H8=e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 g8f6 b1c3 f8b4 c1d2 e8g8 e1c1 f8e8 f1c4 d7d6 g1h3
PGN=1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 O-O 7. O-O-O Re8 8. Bc4 d6 9. Nh3
BASIC=False
[Centre game: Paulsen attack]
ECO=C22
A1H8=e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3
PGN=1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3
BASIC=False
[Centre game: l'Hermet variation]
ECO=C22
A1H8=e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 f7f5
PGN=1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 f5
BASIC=False
[Clemenz (Mead's, Basman's or de Klerk's) opening]
ECO=A00
A1H8=h2h3
PGN=1. h3
BASIC=False
[Colle system]
ECO=D05
A1H8=d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 f1d3 c7c5 c2c3
PGN=1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. c3
BASIC=False
[Corn stalk defence]
ECO=B00
A1H8=e2e4 a7a5
PGN=1. e4 a5
BASIC=False
[Crab opening]
ECO=A00
A1H8=a2a4 e7e5 h2h4
PGN=1. a4 e5 2. h4
BASIC=False
[Czech Benoni defence]
ECO=A56
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e5
PGN=1. d4 Nf6 2. c4 c5 3. d5 e5
BASIC=False
[Czech Benoni: King's Indian system]
ECO=A56
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 e7e5 b1c3 d7d6 e2e4 g7g6
PGN=1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6
BASIC=False
[Damiano's defence]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f6
PGN=1. e4 e5 2. Nf3 f6
BASIC=False
[Danish gambit]
ECO=C21
A1H8=e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2
PGN=1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2
BASIC=True
[Danish gambit: Collijn defence]
ECO=C21
A1H8=e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 d8e7
PGN=1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Qe7
BASIC=False
[Danish gambit: Schlechter defence]
ECO=C21
A1H8=e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 d7d5
PGN=1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 d5
BASIC=False
[Danish gambit: Soerensen defence]
ECO=C21
A1H8=e2e4 e7e5 d2d4 e5d4 c2c3 d7d5
PGN=1. e4 e5 2. d4 exd4 3. c3 d5
BASIC=False
[Doery defence]
ECO=A46
A1H8=d2d4 g8f6 g1f3 f6e4
PGN=1. d4 Nf6 2. Nf3 Ne4
BASIC=False
[Dresden opening]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. c4
BASIC=False
[Dunst (Sleipner, Heinrichsen) opening]
ECO=A00
A1H8=b1c3
PGN=1. Nc3
BASIC=False
[Dunst (Sleipner,Heinrichsen) opening]
ECO=A00
A1H8=b1c3 e7e5
PGN=1. Nc3 e5
BASIC=False
[Durkin's attack]
ECO=A00
A1H8=b1a3
PGN=1. Na3
BASIC=False
[Dutch]
ECO=A80
A1H8=d2d4 f7f5
PGN=1. d4 f5
BASIC=False
[Dutch defence]
ECO=A81
A1H8=d2d4 f7f5 g2g3
PGN=1. d4 f5 2. g3
BASIC=False
[Dutch defence, Alekhine variation]
ECO=A92
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 f6e4
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O Ne4
BASIC=False
[Dutch defence, Blackburne variation]
ECO=A81
A1H8=d2d4 f7f5 g2g3 g8f6 f1g2 e7e6 g1h3
PGN=1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3
BASIC=False
[Dutch defence, Rubinstein variation]
ECO=A84
A1H8=d2d4 f7f5 c2c4 e7e6 b1c3
PGN=1. d4 f5 2. c4 e6 3. Nc3
BASIC=False
[Dutch defence: Bladel variation]
ECO=A84
A1H8=d2d4 f7f5 c2c4 g7g6 b1c3 g8h6
PGN=1. d4 f5 2. c4 g6 3. Nc3 Nh6
BASIC=False
[Dutch defence: Dutch-Indian (Nimzo-Dutch) variation]
ECO=A90
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8b4
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+
BASIC=False
[Dutch with c4 & Nc3]
ECO=A85
A1H8=d2d4 f7f5 c2c4 g8f6 b1c3
PGN=1. d4 f5 2. c4 Nf6 3. Nc3
BASIC=False
[Dutch with c4 & g3]
ECO=A86
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3
PGN=1. d4 f5 2. c4 Nf6 3. g3
BASIC=False
[Dutch, 2.Bg5 variation]
ECO=A80
A1H8=d2d4 f7f5 c1g5
PGN=1. d4 f5 2. Bg5
BASIC=False
[Dutch, Korchnoi attack]
ECO=A80
A1H8=d2d4 f7f5 h2h3
PGN=1. d4 f5 2. h3
BASIC=False
[Dutch, Krejcik gambit]
ECO=A80
A1H8=d2d4 f7f5 g2g4
PGN=1. d4 f5 2. g4
BASIC=False
[Dutch, Manhattan (Alapin, Ulvestad) variation]
ECO=A80
A1H8=d2d4 f7f5 d1d3
PGN=1. d4 f5 2. Qd3
BASIC=False
[Dutch, Spielmann gambit]
ECO=A80
A1H8=d2d4 f7f5 b1c3 g8f6 g2g4
PGN=1. d4 f5 2. Nc3 Nf6 3. g4
BASIC=False
[Dutch, Von Pretzel gambit]
ECO=A80
A1H8=d2d4 f7f5 d1d3 e7e6 g2g4
PGN=1. d4 f5 2. Qd3 e6 3. g4
BASIC=False
[Dutch-Indian, Alekhine variation]
ECO=A90
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8b4 c1d2 b4e7
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ 5. Bd2 Be7
BASIC=False
[Dutch: Balogh defence]
ECO=A82
A1H8=d2d4 f7f5 e2e4 d7d6
PGN=1. d4 f5 2. e4 d6
BASIC=False
[Dutch: Hort-Antoshin system]
ECO=A86
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 d7d6 f1g2 c7c6 b1c3 d8c7
PGN=1. d4 f5 2. c4 Nf6 3. g3 d6 4. Bg2 c6 5. Nc3 Qc7
BASIC=False
[Dutch: Ilyin-Genevsky variation]
ECO=A97
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8
BASIC=False
[Dutch: Ilyin-Genevsky variation with Qc2]
ECO=A98
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 d1c2
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Qc2
BASIC=False
[Dutch: Ilyin-Genevsky variation with b3]
ECO=A99
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 b2b3
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. b3
BASIC=False
[Dutch: Ilyin-Genevsky, Winter variation]
ECO=A97
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 f1e1
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Re1
BASIC=False
[Dutch: Leningrad variation]
ECO=A86
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 g7g6
PGN=1. d4 f5 2. c4 Nf6 3. g3 g6
BASIC=False
[Dutch: Leningrad, Basman system]
ECO=A81
A1H8=d2d4 f7f5 g2g3 g7g6 f1g2 f8g7 g1f3 c7c6 e1g1 g8h6
PGN=1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nf3 c6 5. O-O Nh6
BASIC=False
[Dutch: Leningrad, Karlsbad variation]
ECO=A81
A1H8=d2d4 f7f5 g2g3 g7g6 f1g2 f8g7 g1h3
PGN=1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3
BASIC=False
[Dutch: Leningrad, main variation]
ECO=A87
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 g7g6 f1g2 f8g7 g1f3
PGN=1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3
BASIC=False
[Dutch: Leningrad, main variation with Nc6]
ECO=A89
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 d7d6 b1c3 b8c6
PGN=1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 Nc6
BASIC=False
[Dutch: Leningrad, main variation with c6]
ECO=A88
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 d7d6 b1c3 c7c6
PGN=1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 c6
BASIC=False
[Dutch: Staunton gambit]
ECO=A82
A1H8=d2d4 f7f5 e2e4
PGN=1. d4 f5 2. e4
BASIC=False
[Dutch: Staunton gambit deferred]
ECO=A84
A1H8=d2d4 f7f5 c2c4 e7e6 e2e4
PGN=1. d4 f5 2. c4 e6 3. e4
BASIC=False
[Dutch: Staunton gambit, Alekhine variation]
ECO=A83
A1H8=d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 g7g6 h2h4
PGN=1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. h4
BASIC=False
[Dutch: Staunton gambit, Chigorin variation]
ECO=A83
A1H8=d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 c7c6
PGN=1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 c6
BASIC=False
[Dutch: Staunton gambit, Lasker variation]
ECO=A83
A1H8=d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 g7g6 f2f3
PGN=1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. f3
BASIC=False
[Dutch: Staunton gambit, Nimzovich variation]
ECO=A83
A1H8=d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 b7b6
PGN=1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 b6
BASIC=False
[Dutch: Staunton gambit, Staunton's line]
ECO=A83
A1H8=d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5
PGN=1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5
BASIC=False
[Dutch: Staunton gambit, Tartakower variation]
ECO=A82
A1H8=d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 g2g4
PGN=1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
BASIC=False
[Dutch: classical variation]
ECO=A96
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6
BASIC=False
[Dutch: stonewall variation]
ECO=A92
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5
BASIC=False
[Dutch: stonewall with Ba3]
ECO=A94
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b2b3 c7c6 c1a3
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 c6 8. Ba3
BASIC=False
[Dutch: stonewall with Nc3]
ECO=A92
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3
BASIC=False
[Dutch: stonewall, Botwinnik variation]
ECO=A93
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b2b3
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3
BASIC=False
[Dutch: stonewall: Chekhover variation]
ECO=A95
A1H8=d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3 c7c6 d1c2 d8e8 c1g5
PGN=1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 8. Qc2 Qe8 9. Bg5
BASIC=False
[Dzindzikhashvili defence]
ECO=E10
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 a7a6
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 a6
BASIC=False
[English opening]
ECO=A10
A1H8=c2c4
PGN=1. c4
BASIC=True
[English opening: Agincourt variation]
ECO=A13
A1H8=c2c4 e7e6 g1f3 d7d5
PGN=1. c4 e6 2. Nf3 d5
BASIC=False
[English orangutan]
ECO=A15
A1H8=c2c4 g8f6 b2b4
PGN=1. c4 Nf6 2. b4
BASIC=False
[English, 1...Nf6 (Anglo-Indian defense)]
ECO=A15
A1H8=c2c4 g8f6
PGN=1. c4 Nf6
BASIC=False
[English, Keres variation]
ECO=A21
A1H8=c2c4 e7e5 b1c3 d7d6 g2g3 c7c6
PGN=1. c4 e5 2. Nc3 d6 3. g3 c6
BASIC=False
[English, Kramnik-Shirov counterattack]
ECO=A21
A1H8=c2c4 e7e5 b1c3 f8b4
PGN=1. c4 e5 2. Nc3 Bb4
BASIC=False
[English, Nimzovich variation]
ECO=A20
A1H8=c2c4 e7e5 g1f3
PGN=1. c4 e5 2. Nf3
BASIC=False
[English, Nimzovich, Flohr variation]
ECO=A20
A1H8=c2c4 e7e5 g1f3 e5e4
PGN=1. c4 e5 2. Nf3 e4
BASIC=False
[English, Smyslov defence]
ECO=A21
A1H8=c2c4 e7e5 b1c3 d7d6 g1f3 c8g4
PGN=1. c4 e5 2. Nc3 d6 3. Nf3 Bg4
BASIC=False
[English, Troeger defence]
ECO=A21
A1H8=c2c4 e7e5 b1c3 d7d6 g2g3 c8e6 f1g2 b8c6
PGN=1. c4 e5 2. Nc3 d6 3. g3 Be6 4. Bg2 Nc6
BASIC=False
[English: Adorjan defence]
ECO=A10
A1H8=c2c4 g7g6 e2e4 e7e5
PGN=1. c4 g6 2. e4 e5
BASIC=False
[English: Anglo-Dutch defense]
ECO=A10
A1H8=c2c4 f7f5
PGN=1. c4 f5
BASIC=False
[English: Anglo-Gruenfeld defense]
ECO=A16
A1H8=c2c4 g8f6 b1c3 d7d5
PGN=1. c4 Nf6 2. Nc3 d5
BASIC=False
[English: Anglo-Gruenfeld defense, Korchnoi variation]
ECO=A16
A1H8=c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3 g7g6 g2g3 f8g7 f1g2 e7e5
PGN=1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 e5
BASIC=False
[English: Anglo-Gruenfeld, Czech defense]
ECO=A16
A1H8=c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 g7g6 f1g2 d5b6
PGN=1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6
BASIC=False
[English: Anglo-Gruenfeld, Smyslov defense]
ECO=A16
A1H8=c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 g7g6 f1g2 d5c3
PGN=1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3
BASIC=False
[English: Bellon gambit]
ECO=A22
A1H8=c2c4 e7e5 b1c3 g8f6 g1f3 e5e4 f3g5 b7b5
PGN=1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 b5
BASIC=False
[English: Bled variation]
ECO=A12
A1H8=c2c4 c7c6 g1f3 d7d5 b2b3 g8f6 c1b2 g7g6
PGN=1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 g6
BASIC=False
[English: Botvinnik system]
ECO=A26
A1H8=c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 e2e4
PGN=1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4
BASIC=False
[English: Bradley Beach variation]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 d2d4 e5e4
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 e4
BASIC=False
[English: Bremen system with ...g6]
ECO=A24
A1H8=c2c4 e7e5 b1c3 g8f6 g2g3 g7g6
PGN=1. c4 e5 2. Nc3 Nf6 3. g3 g6
BASIC=False
[English: Bremen system, Keres variation]
ECO=A23
A1H8=c2c4 e7e5 b1c3 g8f6 g2g3 c7c6
PGN=1. c4 e5 2. Nc3 Nf6 3. g3 c6
BASIC=False
[English: Bremen, Smyslov system]
ECO=A22
A1H8=c2c4 e7e5 b1c3 g8f6 g2g3 f8b4
PGN=1. c4 e5 2. Nc3 Nf6 3. g3 Bb4
BASIC=False
[English: Bremen, reverse dragon]
ECO=A22
A1H8=c2c4 e7e5 b1c3 g8f6 g2g3 d7d5
PGN=1. c4 e5 2. Nc3 Nf6 3. g3 d5
BASIC=False
[English: Capablanca's variation]
ECO=A12
A1H8=c2c4 c7c6 g1f3 d7d5 b2b3 g8f6 c1b2 c8g4
PGN=1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Bg4
BASIC=False
[English: Carls' Bremen system]
ECO=A22
A1H8=c2c4 e7e5 b1c3 g8f6 g2g3
PGN=1. c4 e5 2. Nc3 Nf6 3. g3
BASIC=False
[English: Caro-Kann defensive system]
ECO=A11
A1H8=c2c4 c7c6
PGN=1. c4 c6
BASIC=False
[English: Caro-Kann defensive system, Bogolyubov variation]
ECO=A12
A1H8=c2c4 c7c6 g1f3 d7d5 b2b3 c8g4
PGN=1. c4 c6 2. Nf3 d5 3. b3 Bg4
BASIC=False
[English: Jaenisch gambit]
ECO=A10
A1H8=c2c4 b7b5
PGN=1. c4 b5
BASIC=False
[English: Kurajica defence]
ECO=A13
A1H8=c2c4 e7e6 g1f3 d7d5 g2g3 c7c6
PGN=1. c4 e6 2. Nf3 d5 3. g3 c6
BASIC=False
[English: London defensive system]
ECO=A12
A1H8=c2c4 c7c6 g1f3 d7d5 b2b3 g8f6 g2g3 c8f5
PGN=1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. g3 Bf5
BASIC=False
[English: Mikenas-Carls variation]
ECO=A18
A1H8=c2c4 g8f6 b1c3 e7e6 e2e4
PGN=1. c4 Nf6 2. Nc3 e6 3. e4
BASIC=False
[English: Mikenas-Carls, Flohr variation]
ECO=A18
A1H8=c2c4 g8f6 b1c3 e7e6 e2e4 d7d5 e4e5
PGN=1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5
BASIC=False
[English: Mikenas-Carls, Kevitz variation]
ECO=A18
A1H8=c2c4 g8f6 b1c3 e7e6 e2e4 b8c6
PGN=1. c4 Nf6 2. Nc3 e6 3. e4 Nc6
BASIC=False
[English: Mikenas-Carls, Sicilian variation]
ECO=A19
A1H8=c2c4 g8f6 b1c3 e7e6 e2e4 c7c5
PGN=1. c4 Nf6 2. Nc3 e6 3. e4 c5
BASIC=False
[English: Nenarokov variation]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 d2d4 e5d4 f3d4 f8b4 c1g5 h7h6 g5h4 b4c3 b2c3 c6e5
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6 7. Bh4 Bxc3+ 8. bxc3 Ne5
BASIC=False
[English: Neo-Catalan]
ECO=A13
A1H8=c2c4 e7e6 g1f3 d7d5 g2g3 g8f6
PGN=1. c4 e6 2. Nf3 d5 3. g3 Nf6
BASIC=False
[English: Neo-Catalan accepted]
ECO=A13
A1H8=c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 d5c4
PGN=1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4
BASIC=False
[English: Neo-Catalan declined]
ECO=A14
A1H8=c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 e1g1
PGN=1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O
BASIC=False
[English: New York (London) defensive system]
ECO=A12
A1H8=c2c4 c7c6 g1f3 d7d5 b2b3 g8f6 c1b2 c8f5
PGN=1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Bf5
BASIC=False
[English: Nimzo-English opening]
ECO=A17
A1H8=c2c4 g8f6 b1c3 e7e6 g1f3 f8b4
PGN=1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4
BASIC=False
[English: Queens Indian formation]
ECO=A17
A1H8=c2c4 g8f6 b1c3 e7e6 g1f3 b7b6
PGN=1. c4 Nf6 2. Nc3 e6 3. Nf3 b6
BASIC=False
[English: Queens Indian, Romanishin variation]
ECO=A17
A1H8=c2c4 g8f6 b1c3 e7e6 g1f3 b7b6 e2e4 c8b7 f1d3
PGN=1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. e4 Bb7 5. Bd3
BASIC=False
[English: Romanishin gambit]
ECO=A13
A1H8=c2c4 e7e6 g1f3 g8f6 g2g3 a7a6 f1g2 b7b5
PGN=1. c4 e6 2. Nf3 Nf6 3. g3 a6 4. Bg2 b5
BASIC=False
[English: Sicilian reversed]
ECO=A25
A1H8=c2c4 e7e5 b1c3 b8c6
PGN=1. c4 e5 2. Nc3 Nc6
BASIC=False
[English: Symmetrical, Keres defence]
ECO=A14
A1H8=c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 e1g1 c7c5 c4d5 f6d5 b1c3 b8c6
PGN=1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6
BASIC=False
[English: Torre defensive system]
ECO=A12
A1H8=c2c4 c7c6 g1f3 d7d5 b2b3 g8f6 g2g3 c8g4
PGN=1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. g3 Bg4
BASIC=False
[English: Wimpey system]
ECO=A13
A1H8=c2c4 e7e6 g1f3 d7d5 b2b3 g8f6 c1b2 c7c5 e2e3
PGN=1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 c5 5. e3
BASIC=False
[English: closed system]
ECO=A25
A1H8=c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7
PGN=1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
BASIC=False
[English: closed system (without ...d6)]
ECO=A25
A1H8=c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3
PGN=1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3
BASIC=False
[English: closed, 5.Rb1]
ECO=A25
A1H8=c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 a1b1
PGN=1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1
BASIC=False
[English: closed, 5.Rb1 Taimanov variation]
ECO=A25
A1H8=c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 a1b1 g8h6
PGN=1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1 Nh6
BASIC=False
[English: closed, Hort variation]
ECO=A25
A1H8=c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 d7d6 g1e2 c8e6
PGN=1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Be6
BASIC=False
[English: closed, Taimanov variation]
ECO=A25
A1H8=c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 d7d6 g1e2 g8h6
PGN=1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nh6
BASIC=False
[English: four knights system]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6
BASIC=False
[English: four knights, 4.e3]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 e2e3
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3
BASIC=False
[English: four knights, Capablanca variation]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 d2d3
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d3
BASIC=False
[English: four knights, Marini variation]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 a2a3
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. a3
BASIC=False
[English: four knights, Nimzovich variation]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 e2e4
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e4
BASIC=False
[English: four knights, Romanishin variation]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 e2e3 f8b4 d1c2 b4c3
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 Bb4 5. Qc2 Bxc3
BASIC=False
[English: four knights, Stean variation]
ECO=A28
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 e2e3 f8b4 d1c2 e8g8 c3d5 f8e8 c2f5
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5
BASIC=False
[English: four knights, kingside fianchetto]
ECO=A29
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3 g8f6 g2g3
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3
BASIC=False
[English: symmetrical variation]
ECO=A30
A1H8=c2c4 c7c5
PGN=1. c4 c5
BASIC=False
[English: symmetrical, Benoni formation]
ECO=A31
A1H8=c2c4 c7c5 g1f3 g8f6 d2d4
PGN=1. c4 c5 2. Nf3 Nf6 3. d4
BASIC=False
[English: symmetrical, Botvinnik system]
ECO=A36
A1H8=c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e4
PGN=1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4
BASIC=False
[English: symmetrical, Botvinnik system reversed]
ECO=A36
A1H8=c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 e7e5
PGN=1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 e5
BASIC=False
[English: symmetrical, Geller variation]
ECO=A33
A1H8=c2c4 c7c5 g1f3 g8f6 d2d4 c5d4 f3d4 e7e6 b1c3 b8c6 g2g3 d8b6
PGN=1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nc6 6. g3 Qb6
BASIC=False
[English: symmetrical, Rubinstein system]
ECO=A34
A1H8=c2c4 c7c5 b1c3 g8f6 g2g3 d7d5 c4d5 f6d5 f1g2 d5c7
PGN=1. c4 c5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7
BASIC=False
[English: symmetrical, four knights system]
ECO=A35
A1H8=c2c4 c7c5 b1c3 b8c6 g1f3 g8f6
PGN=1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6
BASIC=False
[English: symmetrical, hedgehog system]
ECO=A30
A1H8=c2c4 c7c5 g1f3 g8f6 g2g3 b7b6 f1g2 c8b7 e1g1 e7e6 b1c3 f8e7
PGN=1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7
BASIC=False
[English: symmetrical, hedgehog, flexible formation]
ECO=A30
A1H8=c2c4 c7c5 g1f3 g8f6 g2g3 b7b6 f1g2 c8b7 e1g1 e7e6 b1c3 f8e7 d2d4 c5d4 d1d4 d7d6 f1d1 a7a6 b2b3 b8d7
PGN=1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 d6 9. Rd1 a6 10. b3 Nbd7
BASIC=False
[English: symmetrical, main line with b3]
ECO=A38
A1H8=c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 g8f6 e1g1 e8g8 b2b3
PGN=1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. b3
BASIC=False
[English: symmetrical, main line with d3]
ECO=A38
A1H8=c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 g8f6 e1g1 e8g8 d2d3
PGN=1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. d3
BASIC=False
[English: symmetrical, main line with d4]
ECO=A39
A1H8=c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 g8f6 e1g1 e8g8 d2d4
PGN=1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. d4
BASIC=False
[English: symmetrical, three knights system]
ECO=A34
A1H8=c2c4 c7c5 b1c3 g8f6 g1f3 d7d5 c4d5 f6d5
PGN=1. c4 c5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5
BASIC=False
[English: three knights system]
ECO=A27
A1H8=c2c4 e7e5 b1c3 b8c6 g1f3
PGN=1. c4 e5 2. Nc3 Nc6 3. Nf3
BASIC=False
[English: ultra-symmetrical variation]
ECO=A36
A1H8=c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7
PGN=1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
BASIC=False
[Evans counter-gambit]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 d7d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 d5
BASIC=False
[Evans gambit]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4
BASIC=False
[Evans gambit accepted]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4
BASIC=False
[Evans gambit declined, 5.a4]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 a2a4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4
BASIC=False
[Evans gambit declined, Cordel variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 c1b2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. Bb2
BASIC=False
[Evans gambit declined, Hicken variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 d8g5 d1f3 g5e5 f3f7 e8d8 c1b2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5 7. Qf3 Qxe5 8. Qxf7+ Kd8 9. Bb2
BASIC=False
[Evans gambit declined, Hirschbach variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 d8g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5
BASIC=False
[Evans gambit declined, Lange variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 g8h6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Nh6
BASIC=False
[Evans gambit declined, Pavlov variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 g8h6 d2d4 d7d6 c1h6 d6e5 h6g7 h8g8 c4f7 e8f7 g7e5 d8g5 b1d2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Nh6 7. d4 d6 8. Bxh6 dxe5 9. Bxg7 Rg8 10. Bxf7+ Kxf7 11. Bxe5 Qg5 12. Nd2
BASIC=False
[Evans gambit declined, Showalter variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 a2a4 a7a6 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4 a6 6. Nc3
BASIC=False
[Evans gambit declined, Vasquez variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 d8g5 c4f7 e8e7 d1h5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5 7. Bxf7+ Ke7 8. Qh5
BASIC=False
[Evans gambit: 5...Be7]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7
BASIC=False
[Evans gambit: Alapin-Steinitz variation]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6 d2d4 c8g4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bg4
BASIC=False
[Evans gambit: Cordel variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4e7 d2d4 c6a5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5
BASIC=False
[Evans gambit: Fraser attack]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c8g4 d1a4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Bg4 10. Qa4
BASIC=False
[Evans gambit: Fraser-Mortimer attack]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c8g4 d1a4 g4d7 a4b3 c6a5 c4f7 e8f8 b3c2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Bg4 10. Qa4 Bd7 11. Qb3 Na5 12. Bxf7+ Kf8 13. Qc2
BASIC=False
[Evans gambit: Goering attack]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c6a5 c1g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Na5 10. Bg5
BASIC=False
[Evans gambit: Lasker defence]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6 d2d4 a5b6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bb6
BASIC=False
[Evans gambit: Leonhardt variation]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 b7b5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 b5
BASIC=False
[Evans gambit: Levenfish variation]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6 d1b3 d8d7 d4e5 d6e5 e1g1 a5b6 c1a3 c6a5 f3e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8. dxe5 dxe5 9. O-O Bb6 10. Ba3 Na5 11. Nxe5
BASIC=False
[Evans gambit: Mayet defence]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4f8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bf8
BASIC=False
[Evans gambit: Morphy attack]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3
BASIC=False
[Evans gambit: Paulsen variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 d4d5 c6a5 c1b2 g8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. d5 Na5 10. Bb2 Ne7
BASIC=False
[Evans gambit: Richardson attack]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 g8f6 d2d4 e8g8 f3e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O Nf6 7. d4 O-O 8. Nxe5
BASIC=False
[Evans gambit: Sanders-Alapin variation]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6 d2d4 c8d7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bd7
BASIC=False
[Evans gambit: Sokolsky variation]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6 c1g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Bg5
BASIC=False
[Evans gambit: Steinitz variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c6a5 c1g5 f7f6 g5e3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Na5 10. Bg5 f6 11. Be3
BASIC=False
[Evans gambit: Stone-Ware variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bd6
BASIC=False
[Evans gambit: Tartakower attack]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6 d1b3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3
BASIC=False
[Evans gambit: Ulvestad variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 d4d5 c6a5 c1b2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. d5 Na5 10. Bb2
BASIC=False
[Evans gambit: Waller attack]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6 d2d4 e5d4 d1b3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 exd4 8. Qb3
BASIC=False
[Evans gambit: compromised defence]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3
BASIC=False
[Evans gambit: compromised defence, Paulsen variation]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4c3 d1b3 d8f6 e4e5 f6g6 b1c3 g8e7 c1a3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3 8. Qb3 Qf6 9. e5 Qg6 10. Nxc3 Nge7 11. Ba3
BASIC=False
[Evans gambit: compromised defence, Potter variation]
ECO=C52
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4c3 d1b3 d8f6 e4e5 f6g6 b1c3 g8e7 f1d1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3 8. Qb3 Qf6 9. e5 Qg6 10. Nxc3 Nge7 11. Rd1
BASIC=False
[Evans gambit: normal variation]
ECO=C51
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6
BASIC=False
[Four knights]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3
BASIC=False
[Four knights game]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6
BASIC=False
[Four knights: Alatortsev variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d8e7 c3e2 d7d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Qe7 7. Ne2 d5
BASIC=False
[Four knights: Bardeleben variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8c5 e1g1 e8g8 f3e5 c6e5 d2d4 c5d6 f2f4 e5c6 e4e5 d6b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nxe5 7. d4 Bd6 8. f4 Nc6 9. e5 Bb4
BASIC=False
[Four knights: Belgrade gambit]
ECO=C47
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 c3d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5
BASIC=False
[Four knights: Gunsberg counter-attack]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 c3d5 f6d5 e4d5 e5e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. Nd5 Nxd5 7. exd5 e4
BASIC=False
[Four knights: Gunsberg variation]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 a2a3
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3
BASIC=False
[Four knights: Italian variation]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bc4
BASIC=False
[Four knights: Janowski variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3 b2c3 d7d6 f1e1
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Re1
BASIC=False
[Four knights: Marshall variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8c5 e1g1 e8g8 f3e5 c6d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nd4
BASIC=False
[Four knights: Nimzovich (Paulsen) variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 b5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. Bxc6
BASIC=False
[Four knights: Ranken variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 a7a6 b5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6
BASIC=False
[Four knights: Rubinstein counter-gambit]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4
BASIC=False
[Four knights: Rubinstein counter-gambit Maroczy variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5e2 d4f3 e2f3 f8c5 e1g1 e8g8 d2d3 d7d6 c3a4 c5b6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2 Nxf3+ 6. Bxf3 Bc5 7. O-O O-O 8. d3 d6 9. Na4 Bb6
BASIC=False
[Four knights: Rubinstein counter-gambit, 5.Be2]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2
BASIC=False
[Four knights: Rubinstein counter-gambit, Bogolyubov variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 f3e5 d8e7 f2f4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxe5 Qe7 6. f4
BASIC=False
[Four knights: Rubinstein counter-gambit, Henneberger variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 e1g1
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. O-O
BASIC=False
[Four knights: Rubinstein counter-gambit, exchange variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 f3d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxd4
BASIC=False
[Four knights: Schultze-Mueller gambit]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f3e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5
BASIC=False
[Four knights: Scotch variation]
ECO=C47
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4
BASIC=False
[Four knights: Scotch, 4...exd4]
ECO=C47
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4
BASIC=False
[Four knights: Scotch, Krause variation]
ECO=C47
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 f8b4 f3e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. Nxe5
BASIC=False
[Four knights: Spanish variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5
BASIC=False
[Four knights: Spanish, classical defence]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5
BASIC=False
[Four knights: Spielmann variation]
ECO=C48
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 a7a6 b5c6 d7c6 f3e5 f6e4 c3e4 d8d4 e1g1 d4e5 f1e1 c8e6 d2d4 e5d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6 dxc6 6. Nxe5 Nxe4 7. Nxe4 Qd4 8. O-O Qxe5 9. Re1 Be6 10. d4 Qd5
BASIC=False
[Four knights: Svenonius variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3 b2c3 d7d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d5
BASIC=False
[Four knights: double Ruy Lopez]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4
BASIC=False
[Four knights: symmetrical variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6
BASIC=False
[Four knights: symmetrical, Blake variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c6e7 f3h4 c7c6 b5c4 d6d5 c4b3 d8d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7 8. Nh4 c6 9. Bc4 d5 10. Bb3 Qd6
BASIC=False
[Four knights: symmetrical, Capablanca variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 b4c3 b2c3 d8e7 f1e1 c6d8 d3d4 c8g4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Bg4
BASIC=False
[Four knights: symmetrical, Maroczy system]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c3e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Ne2
BASIC=False
[Four knights: symmetrical, Metger unpin]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 b4c3 b2c3 d8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7
BASIC=False
[Four knights: symmetrical, Pillsbury variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c6e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7
BASIC=False
[Four knights: symmetrical, Tarrasch variation]
ECO=C49
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c8e6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Be6
BASIC=False
[Fred]
ECO=B00
A1H8=e2e4 f7f5
PGN=1. e4 f5
BASIC=False
[French defence]
ECO=C00
A1H8=e2e4 e7e6
PGN=1. e4 e6
BASIC=True
[French defence, Steiner variation]
ECO=C00
A1H8=e2e4 e7e6 c2c4
PGN=1. e4 e6 2. c4
BASIC=False
[French: Alapin variation]
ECO=C00
A1H8=e2e4 e7e6 d2d4 d7d5 c1e3
PGN=1. e4 e6 2. d4 d5 3. Be3
BASIC=False
[French: Albin-Alekhine-Chatard attack]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4
BASIC=False
[French: Albin-Alekhine-Chatard attack, Breyer variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 c7c5
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 c5
BASIC=False
[French: Albin-Alekhine-Chatard attack, Maroczy variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 a7a6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 a6
BASIC=False
[French: Albin-Alekhine-Chatard attack, Spielmann variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 e8g8
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 O-O
BASIC=False
[French: Albin-Alekhine-Chatard attack, Teichmann variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 f7f6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 f6
BASIC=False
[French: Burn variation]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 d5e4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4
BASIC=False
[French: Chigorin variation]
ECO=C00
A1H8=e2e4 e7e6 d1e2
PGN=1. e4 e6 2. Qe2
BASIC=False
[French: Fort Knox variation]
ECO=C10
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 c8d7 g1f3 d7c6
PGN=1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bd7 5. Nf3 Bc6
BASIC=False
[French: Frere (Becker) variation]
ECO=C10
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 d8d5
PGN=1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Qd5
BASIC=False
[French: Henneberger variation]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1e3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Be3
BASIC=False
[French: King's Indian attack]
ECO=C00
A1H8=e2e4 e7e6 d2d3
PGN=1. e4 e6 2. d3
BASIC=False
[French: Labourdonnais variation]
ECO=C00
A1H8=e2e4 e7e6 f2f4
PGN=1. e4 e6 2. f4
BASIC=False
[French: MacCutcheon variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4
BASIC=False
[French: MacCutcheon, Bernstein variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5h4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bh4
BASIC=False
[French: MacCutcheon, Bogolyubov variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4d5 d8d5 g5f6 g7f6 d1d2 d5a5
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. exd5 Qxd5 6. Bxf6 gxf6 7. Qd2 Qa5
BASIC=False
[French: MacCutcheon, Chigorin variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 e5f6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6
BASIC=False
[French: MacCutcheon, Dr. Olland (Dutch) variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5c1
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bc1
BASIC=False
[French: MacCutcheon, Duras variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3 b2c3 f6e4 d1g4 e8f8 d2c1
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 Kf8 9. Bc1
BASIC=False
[French: MacCutcheon, Grigoriev variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 e5f6 h6g5 f6g7 h8g8 h2h4 g5h4 d1g4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6 hxg5 7. fxg7 Rg8 8. h4 gxh4 9. Qg4
BASIC=False
[French: MacCutcheon, Janowski variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5e3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Be3
BASIC=False
[French: MacCutcheon, Lasker variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3
BASIC=False
[French: MacCutcheon, Lasker variation, 8...g6]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3 b2c3 f6e4 d1g4 g7g6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 g6
BASIC=False
[French: MacCutcheon, Tartakower variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 f6d7
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Nfd7
BASIC=False
[French: MacCutcheon, advance variation]
ECO=C12
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5
BASIC=False
[French: Marshall variation]
ECO=C10
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 c7c5
PGN=1. e4 e6 2. d4 d5 3. Nc3 c5
BASIC=False
[French: Paulsen variation]
ECO=C10
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3
PGN=1. e4 e6 2. d4 d5 3. Nc3
BASIC=False
[French: Pelikan variation]
ECO=C00
A1H8=e2e4 e7e6 b1c3 d7d5 f2f4
PGN=1. e4 e6 2. Nc3 d5 3. f4
BASIC=False
[French: Reti (Spielmann) variation]
ECO=C00
A1H8=e2e4 e7e6 b2b3
PGN=1. e4 e6 2. b3
BASIC=False
[French: Reversed Philidor formation]
ECO=C00
A1H8=e2e4 e7e6 d2d3 d7d5 b1d2 g8f6 g1f3 b8c6 f1e2
PGN=1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Nc6 5. Be2
BASIC=False
[French: Rubinstein variation]
ECO=C10
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 d5e4
PGN=1. e4 e6 2. d4 d5 3. Nc3 dxe4
BASIC=False
[French: Rubinstein, Capablanca line]
ECO=C10
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7 g1f3 g8f6 e4f6 d7f6 f3e5
PGN=1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Ne5
BASIC=False
[French: Schlechter variation]
ECO=C00
A1H8=e2e4 e7e6 d2d4 d7d5 f1d3
PGN=1. e4 e6 2. d4 d5 3. Bd3
BASIC=False
[French: Steinitz attack]
ECO=C00
A1H8=e2e4 e7e6 e4e5
PGN=1. e4 e6 2. e5
BASIC=False
[French: Steinitz variation]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5
BASIC=False
[French: Steinitz, Boleslavsky variation]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 g1f3 b8c6 c1e3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3
BASIC=False
[French: Steinitz, Bradford attack]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 f8c5 d1g4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Bxc5 7. Qg4
BASIC=False
[French: Steinitz, Brodsky-Jones variation]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 b8c6 a2a3 f8c5 d1g4 e8g8 g1f3 f7f6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Nc6 7. a3 Bxc5 8. Qg4 O-O 9. Nf3 f6
BASIC=False
[French: Steinitz, Gledhill attack]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 d1g4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Qg4
BASIC=False
[French: Swiss variation]
ECO=C11
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 f1d3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bd3
BASIC=False
[French: Tarrasch]
ECO=C03
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2
PGN=1. e4 e6 2. d4 d5 3. Nd2
BASIC=True
[French: Tarrasch, Botvinnik variation]
ECO=C05
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b7b6
PGN=1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 b6
BASIC=False
[French: Tarrasch, Eliskases variation]
ECO=C07
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 d8d5 g1f3 c5d4 f1c4 d5d8
PGN=1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd8
BASIC=False
[French: Tarrasch, Guimard main line]
ECO=C04
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 b8c6 g1f3 g8f6
PGN=1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6
BASIC=False
[French: Tarrasch, Guimard variation]
ECO=C03
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 b8c6
PGN=1. e4 e6 2. d4 d5 3. Nd2 Nc6
BASIC=False
[French: Tarrasch, Haberditz variation]
ECO=C03
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 f7f5
PGN=1. e4 e6 2. d4 d5 3. Nd2 f5
BASIC=False
[French: Tarrasch, Leningrad variation]
ECO=C06
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6 g1e2 c5d4 c3d4 d7b6
PGN=1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 Nb6
BASIC=False
[French: Tarrasch, closed variation]
ECO=C05
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 g8f6
PGN=1. e4 e6 2. d4 d5 3. Nd2 Nf6
BASIC=False
[French: Tarrasch, closed variation, main line]
ECO=C06
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6 g1e2 c5d4 c3d4
PGN=1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4
BASIC=False
[French: Tarrasch, open variation]
ECO=C07
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 c7c5
PGN=1. e4 e6 2. d4 d5 3. Nd2 c5
BASIC=False
[French: Tarrasch, open variation, main line]
ECO=C09
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5 g1f3 b8c6
PGN=1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6
BASIC=False
[French: Tarrasch, open, 4.ed ed]
ECO=C08
A1H8=e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5
PGN=1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5
BASIC=False
[French: Two knights variation]
ECO=C00
A1H8=e2e4 e7e6 b1c3 d7d5 g1f3
PGN=1. e4 e6 2. Nc3 d5 3. Nf3
BASIC=False
[French: Winawer (Nimzovich) variation]
ECO=C15
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4
BASIC=False
[French: Winawer, Alekhine (Maroczy) gambit]
ECO=C15
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2
BASIC=False
[French: Winawer, Alekhine gambit]
ECO=C15
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2 d5e4 a2a3 b4c3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Bxc3+
BASIC=False
[French: Winawer, Alekhine gambit, Alatortsev variation]
ECO=C15
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2 d5e4 a2a3 b4e7 c3e4 g8f6 e2g3 e8g8 f1e2 b8c6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Be7 6. Nxe4 Nf6 7. N2g3 O-O 8. Be2 Nc6
BASIC=False
[French: Winawer, Alekhine gambit, Kan variation]
ECO=C15
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2 d5e4 a2a3 b4c3 e2c3 b8c6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Bxc3+ 6. Nxc3 Nc6
BASIC=False
[French: Winawer, Kondratiyev variation]
ECO=C15
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 f1d3 c7c5 e4d5 d8d5 c1d2
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd3 c5 5. exd5 Qxd5 6. Bd2
BASIC=False
[French: Winawer, Petrosian variation]
ECO=C16
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 d8d7
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7
BASIC=False
[French: Winawer, advance variation]
ECO=C16
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5
BASIC=False
[French: Winawer, advance, 5.a3]
ECO=C17
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3
BASIC=False
[French: Winawer, advance, 6...Ne7]
ECO=C19
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7
BASIC=False
[French: Winawer, advance, Bogolyubov variation]
ECO=C17
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 c1d2
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2
BASIC=False
[French: Winawer, advance, Rauzer variation]
ECO=C17
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 c5d4 a3b4 d4c3 g1f3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 cxd4 6. axb4 dxc3 7. Nf3
BASIC=False
[French: Winawer, advance, Russian variation]
ECO=C17
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 d1g4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Qg4
BASIC=False
[French: Winawer, advance, Smyslov variation]
ECO=C19
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 a3a4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. a4
BASIC=False
[French: Winawer, advance, poisoned pawn variation]
ECO=C19
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4
BASIC=False
[French: Winawer, advance, poisoned pawn, Euwe-Gligoric variation]
ECO=C19
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4 d8c7 g4g7 h8g8 g7h7 c5d4 e1d1
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Kd1
BASIC=False
[French: Winawer, advance, poisoned pawn, Konstantinopolsky variation]
ECO=C19
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4 d8c7 g4g7 h8g8 g7h7 c5d4 g1e2
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2
BASIC=False
[French: Winawer, advance, positional main line]
ECO=C19
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 g1f3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3
BASIC=False
[French: Winawer, classical variation]
ECO=C18
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 d8c7
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7
BASIC=False
[French: Winawer, fingerslip variation]
ECO=C15
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 c1d2
PGN=1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2
BASIC=False
[French: Wing gambit]
ECO=C00
A1H8=e2e4 e7e6 g1f3 d7d5 e4e5 c7c5 b2b4
PGN=1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4
BASIC=False
[French: advance variation]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5
PGN=1. e4 e6 2. d4 d5 3. e5
BASIC=True
[French: advance, Euwe variation]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 c8d7
PGN=1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7
BASIC=False
[French: advance, Milner-Barry gambit]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 f1d3
PGN=1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3
BASIC=False
[French: advance, Nimzovich system]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 g1f3
PGN=1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3
BASIC=False
[French: advance, Nimzovich variation]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d1g4
PGN=1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4
BASIC=False
[French: advance, Paulsen attack]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3
PGN=1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3
BASIC=False
[French: advance, Steinitz variation]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d4c5
PGN=1. e4 e6 2. d4 d5 3. e5 c5 4. dxc5
BASIC=False
[French: advance, Wade variation]
ECO=C02
A1H8=e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 d8b6 g1f3 c8d7
PGN=1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7
BASIC=False
[French: classical]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7
BASIC=False
[French: classical variation]
ECO=C14
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7
BASIC=False
[French: classical, Alapin variation]
ECO=C14
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 c3b5
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Nb5
BASIC=False
[French: classical, Anderssen variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 g5f6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6
BASIC=False
[French: classical, Anderssen-Richter variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 g5f6 e7f6 e4e5 f6e7 d1g4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4
BASIC=False
[French: classical, Frankfurt variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6g8 g5e3 b7b6
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6
BASIC=False
[French: classical, Pollock variation]
ECO=C14
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 d1g4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Qg4
BASIC=False
[French: classical, Rubinstein variation]
ECO=C14
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 d1d2
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Qd2
BASIC=False
[French: classical, Stahlberg variation]
ECO=C14
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 f2f4 e8g8 g1f3 c7c5 d1d2 b8c6 e1c1 c5c4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 O-O 8. Nf3 c5 9. Qd2 Nc6 10. O-O-O c4
BASIC=False
[French: classical, Steinitz variation]
ECO=C14
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 f2f4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4
BASIC=False
[French: classical, Tarrasch variation]
ECO=C14
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 f1d3
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Bd3
BASIC=False
[French: classical, Tartakower variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6e4
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ne4
BASIC=False
[French: classical, Vistaneckis (Nimzovich) variation]
ECO=C13
A1H8=e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6g8
PGN=1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8
BASIC=False
[French: exchange variation]
ECO=C01
A1H8=e2e4 e7e6 d2d4 d7d5 e4d5
PGN=1. e4 e6 2. d4 d5 3. exd5
BASIC=False
[French: exchange, Bogolyubov variation]
ECO=C01
A1H8=e2e4 e7e6 d2d4 d7d5 e4d5 e6d5 b1c3 g8f6 c1g5 b8c6
PGN=1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 Nc6
BASIC=False
[French: exchange, Svenonius variation]
ECO=C01
A1H8=e2e4 e7e6 d2d4 d7d5 e4d5 e6d5 b1c3 g8f6 c1g5
PGN=1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5
BASIC=False
[Fried fox defence]
ECO=B00
A1H8=e2e4 f7f6 d2d4 e8f7
PGN=1. e4 f6 2. d4 Kf7
BASIC=False
[Gedult attack]
ECO=A45
A1H8=d2d4 g8f6 f2f3 d7d5 g2g4
PGN=1. d4 Nf6 2. f3 d5 3. g4
BASIC=False
[Gedult's opening]
ECO=A00
A1H8=f2f3
PGN=1. f3
BASIC=False
[Giuoco Pianissimo]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3
BASIC=False
[Giuoco Pianissimo: Canal variation]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 g8f6 b1c3 d7d6 c1g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 d6 6. Bg5
BASIC=False
[Giuoco Pianissimo: Dubois variation]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 f7f5 f3g5 f5f4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 f5 5. Ng5 f4
BASIC=False
[Giuoco Pianissimo: Italian four knights variation]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 g8f6 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3
BASIC=False
[Giuoco Piano]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5
BASIC=True
[Giuoco Piano: Aitken variation]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 e4c3 b2c3 b4c3 c1a3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Nxc3 9. bxc3 Bxc3 10. Ba3
BASIC=False
[Giuoco Piano: Anderssen variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e4e5 d7d5 c4b5 f6e4 c3d4 c5b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb4+
BASIC=False
[Giuoco Piano: Bernstein variation]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 e4c3 b2c3 b4c3 d1b3 d7d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Nxc3 9. bxc3 Bxc3 10. Qb3 d5
BASIC=False
[Giuoco Piano: Bird's attack]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 b2b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. b4
BASIC=False
[Giuoco Piano: Cracow variation]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 e1f1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Kf1
BASIC=False
[Giuoco Piano: Eisinger variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6 d4d5 c6b8 d5d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. d5 Nb8 7. d6
BASIC=False
[Giuoco Piano: Ghulam Kassim variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e4e5 f6e4 c4d5 e4f2 e1f2 d4c3 f2g3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 Ne4 7. Bd5 Nxf2 8. Kxf2 dxc3+ 9. Kg3
BASIC=False
[Giuoco Piano: Greco variation]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 e4c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Nxc3
BASIC=False
[Giuoco Piano: Greco's attack]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3
BASIC=False
[Giuoco Piano: Jerome gambit]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c4f7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Bxf7+
BASIC=False
[Giuoco Piano: Krause variation]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 c1d2 f6e4 d2b4 c6b4 c4f7 e8f7 d1b3 d7d5 f3e5 f7f6 f2f3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Nxe4 8. Bxb4 Nxb4 9. Bxf7+ Kxf7 10. Qb3+ d5 11. Ne5+ Kf6 12. f3
BASIC=False
[Giuoco Piano: LaBourdonnais variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d7d6 d2d4 e5d4 c3d4 c5b6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6
BASIC=False
[Giuoco Piano: Mestel variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6 c1g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. Bg5
BASIC=False
[Giuoco Piano: Moeller (Therkatz) attack]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 d4d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5
BASIC=False
[Giuoco Piano: Moeller, bayonet attack]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 d4d5 c3f6 f1e1 c6e7 e1e4 d7d6 g2g4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. g4
BASIC=False
[Giuoco Piano: Steinitz variation]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 b2c3 d7d5 c1a3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. bxc3 d5 10. Ba3
BASIC=False
[Giuoco Piano: Tarrasch variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6 e1g1 g8f6 a2a4 a7a6 f1e1 d7d6 h2h3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. O-O Nf6 7. a4 a6 8. Re1 d6 9. h3
BASIC=False
[Giuoco Piano: Therkatz-Herzog variation]
ECO=C54
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 d4d5 c3f6 f1e1 c6e7 e1e4 d7d6 c1g5 f6g5 f3g5 e8g8 g5h7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Bg5 Bxg5 13. Nxg5 O-O 14. Nxh7
BASIC=False
[Giuoco Piano: centre-holding variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6
BASIC=False
[Giuoco Piano: close variation]
ECO=C53
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7
BASIC=False
[Giuoco Piano: four knights variation]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b1c3 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6
BASIC=True
[Giuoco piano]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 d2d4 c5d4 f3d4 c6d4 c1g5 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 d6
BASIC=False
[Giuoco piano: Holzhausen attack]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 d2d4 c5d4 f3d4 c6d4 c1g5 d7d6 f2f4 d8e7 f4e5 d6e5 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 d6 8. f4 Qe7 9. fxe5 dxe5 10. Nc3
BASIC=False
[Giuoco piano: Rosentreter variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 d2d4 c5d4 f3d4 c6d4 c1g5 h7h6 g5h4 g7g5 f2f4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 h6 8. Bh4 g5 9. f4
BASIC=False
[Global opening]
ECO=A00
A1H8=h2h3 e7e5 a2a3
PGN=1. h3 e5 2. a3
BASIC=False
[Greco defence]
ECO=C40
A1H8=e2e4 e7e5 g1f3 d8f6
PGN=1. e4 e5 2. Nf3 Qf6
BASIC=False
[Grob's attack]
ECO=A00
A1H8=g2g4
PGN=1. g4
BASIC=False
[Grob: Fritz gambit]
ECO=A00
A1H8=g2g4 d7d5 f1g2 c8g4 c2c4
PGN=1. g4 d5 2. Bg2 Bxg4 3. c4
BASIC=False
[Grob: Romford counter-gambit]
ECO=A00
A1H8=g2g4 d7d5 f1g2 c8g4 c2c4 d5d4
PGN=1. g4 d5 2. Bg2 Bxg4 3. c4 d4
BASIC=False
[Grob: spike attack]
ECO=A00
A1H8=g2g4 d7d5 f1g2 c7c6 g4g5
PGN=1. g4 d5 2. Bg2 c6 3. g5
BASIC=False
[Gruenfeld defence]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5
BASIC=True
[Gruenfeld defence: Smyslov, Yugoslav variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 c4b3 c7c5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5
BASIC=False
[Gruenfeld defence: Smyslov, main line]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 c4b3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3
BASIC=False
[Gruenfeld with Bf4    e3]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1f4 e8g8 e2e3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3
BASIC=False
[Gruenfeld with e3    Bd3]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 f1d3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3
BASIC=False
[Gruenfeld with e3 & Qb3]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 d1b3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3
BASIC=False
[Gruenfeld: 4.Bf4]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4
BASIC=False
[Gruenfeld: 5.Bf4]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1f4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4
BASIC=False
[Gruenfeld: 5.Bg5]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1g5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5
BASIC=False
[Gruenfeld: 5.e3]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3
BASIC=False
[Gruenfeld: Botvinnik variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 d1b3 e7e6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 e6
BASIC=False
[Gruenfeld: Flohr defence]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 f1d3 c7c6 e1g1 c8f5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3 c6 7. O-O Bf5
BASIC=False
[Gruenfeld: Flohr variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1a4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qa4+
BASIC=False
[Gruenfeld: Gruenfeld gambit]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O
BASIC=False
[Gruenfeld: Gruenfeld gambit accepted]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 c4d5 f6d5 c3d5 d8d5 f4c7
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7
BASIC=False
[Gruenfeld: Gruenfeld gambit, Botvinnik variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 a1c1 c7c5 d4c5 c8e6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 c5 7. dxc5 Be6
BASIC=False
[Gruenfeld: Gruenfeld gambit, Capablanca variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 a1c1
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1
BASIC=False
[Gruenfeld: Lundin variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1g5 f6e4 c3e4 d5e4 d1d2 c7c5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Nxe4 dxe4 6. Qd2 c5
BASIC=False
[Gruenfeld: Makogonov variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 b2b4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. b4
BASIC=False
[Gruenfeld: Opovcensky variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 c1d2
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2
BASIC=False
[Gruenfeld: Pachman variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 d1b3 d5c4 f1c4 b8d7 f3g5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 dxc4 7. Bxc4 Nbd7 8. Ng5
BASIC=False
[Gruenfeld: Russian variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 d1b3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3
BASIC=False
[Gruenfeld: Russian variation with e4]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4
BASIC=False
[Gruenfeld: Russian, Alekhine (Hungarian) variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 a7a6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6
BASIC=False
[Gruenfeld: Russian, Byrne (Simagin) variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b8c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Nc6
BASIC=False
[Gruenfeld: Russian, Keres variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 f1e2 d7b6 c4d3 b8c6 e1c1
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Be2 Nb6 10. Qd3 Nc6 11. O-O-O
BASIC=False
[Gruenfeld: Russian, Levenfish variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b7b6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 b6
BASIC=False
[Gruenfeld: Russian, Prins variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b8a6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Na6
BASIC=False
[Gruenfeld: Russian, Smyslov variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4
BASIC=False
[Gruenfeld: Russian, Szabo (Boleslavsky) variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c7c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 c6
BASIC=False
[Gruenfeld: Schlechter variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 c7c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 c6
BASIC=False
[Gruenfeld: Smyslov defence]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 f1d3 c7c6 e1g1 c8g4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3 c6 7. O-O Bg4
BASIC=False
[Gruenfeld: Spassky variation, main line, 10...cd, 11.cd]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 c7c5 e1g1 b8c6 c1e3 c5d4 c3d4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 cxd4 11. cxd4
BASIC=False
[Gruenfeld: Spassky variation, main line, 13.Bd3]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 c7c5 e1g1 b8c6 c1e3 c5d4 c3d4 c8g4 f2f3 c6a5 c4d3 g4e6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 cxd4 11. cxd4 Bg4 12. f3 Na5 13. Bd3 Be6
BASIC=False
[Gruenfeld: Spike gambit]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g2g4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. g4
BASIC=False
[Gruenfeld: Stockholm variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1g5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5
BASIC=False
[Gruenfeld: Three knights variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3
BASIC=False
[Gruenfeld: exchange variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5
BASIC=False
[Gruenfeld: exchange, Larsen variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 d8d7 e1g1 b7b6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Qd7 9. O-O b6
BASIC=False
[Gruenfeld: exchange, Seville variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 c7c5 e1g1 b8c6 c1e3 c8g4 f2f3 c6a5 c4f7
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 Bg4 11. f3 Na5 12. Bxf7+
BASIC=False
[Gruenfeld: exchange, Simagin's improved variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 b8c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Nc6
BASIC=False
[Gruenfeld: exchange, Simagin's lesser variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 b7b6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 b6
BASIC=False
[Gruenfeld: exchange, Sokolsky variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 c7c5 e1g1 b8c6 c1e3 c5d4 c3d4 c8g4 f2f3 c6a5 c4d3 g4e6 d4d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 cxd4 11. cxd4 Bg4 12. f3 Na5 13. Bd3 Be6 14. d5
BASIC=False
[Gruenfeld: exchange, Spassky variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 c7c5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5
BASIC=False
[Gruenfeld: exchange, classical variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4
BASIC=False
[Gruenfeld: modern exchange variation]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 g1f3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3
BASIC=False
[Guatemala defence]
ECO=B00
A1H8=e2e4 b7b6 d2d4 c8a6
PGN=1. e4 b6 2. d4 Ba6
BASIC=False
[Gunderam defence]
ECO=C40
A1H8=e2e4 e7e5 g1f3 d8e7
PGN=1. e4 e5 2. Nf3 Qe7
BASIC=False
[Halasz gambit]
ECO=C21
A1H8=e2e4 e7e5 d2d4 e5d4 f2f4
PGN=1. e4 e5 2. d4 exd4 3. f4
BASIC=False
[Hammerschlag (Fried fox/Pork chop opening)]
ECO=A00
A1H8=f2f3 e7e5 e1f2
PGN=1. f3 e5 2. Kf2
BASIC=False
[Hawk (Habichd) defence]
ECO=A43
A1H8=d2d4 c7c5 d4d5 g8f6 g1f3 c5c4
PGN=1. d4 c5 2. d5 Nf6 3. Nf3 c4
BASIC=False
[Hippopotamus defence]
ECO=B00
A1H8=e2e4 g8h6 d2d4 g7g6 c2c4 f7f6
PGN=1. e4 Nh6 2. d4 g6 3. c4 f6
BASIC=False
[Hungarian defence]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7
BASIC=False
[Hungarian defence: Tartakower variation]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f8e7 d2d4 e5d4 c2c3 g8f6 e4e5 f6e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4 5. c3 Nf6 6. e5 Ne4
BASIC=False
[Inverted Hanham]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d3 d7d5 b1d2
PGN=1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d3 d5 5. Nbd2
BASIC=False
[Inverted Hungarian]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 f1e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Be2
BASIC=False
[Irish (Chicago) gambit]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 f3e5 c6e5 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Nxe5 Nxe5 4. d4
BASIC=False
[Italian opening]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4
BASIC=True
[KGA: Abbazia defence (classical defence, modern defence[!])]
ECO=C36
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 d7d5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 d5
BASIC=False
[KGA: Abbazia defence, Botvinnik variation]
ECO=C36
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5 g8f6 f1b5 c7c6 d5c6 b7c6 b5c4 f6d5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6 5. Bb5+ c6 6. dxc6 bxc6 7. Bc4 Nd5
BASIC=False
[KGA: Abbazia defence, modern variation]
ECO=C36
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5 g8f6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6
BASIC=False
[KGA: Allgaier gambit]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5
BASIC=False
[KGA: Allgaier, Blackburne gambit]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 b1c3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Nc3
BASIC=False
[KGA: Allgaier, Cook variation]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4 d7d5 c1f4 d5e4 f1c4 f7g7 f4e5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4 d5 8. Bxf4 dxe4 9. Bc4+ Kg7 10. Be5+
BASIC=False
[KGA: Allgaier, Horny defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d1g4 g8f6 g4f4 f8d6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Qxg4 Nf6 8. Qxf4 Bd6
BASIC=False
[KGA: Allgaier, Schlechter defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 g8f6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 Nf6
BASIC=False
[KGA: Allgaier, Thorold variation]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4
BASIC=False
[KGA: Allgaier, Urusov attack]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 f1c4 d7d5 c4d5 f7g7 d2d4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+ d5 8. Bxd5+ Kg7 9. d4
BASIC=False
[KGA: Allgaier, Walker attack]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 f1c4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+
BASIC=False
[KGA: Becker defence]
ECO=C34
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 h7h6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 h6
BASIC=False
[KGA: Blachly gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 b8c6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Nc6
BASIC=False
[KGA: Bonsch-Osmolovsky variation]
ECO=C34
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g8e7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 Ne7
BASIC=False
[KGA: Breyer gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 d1f3
PGN=1. e4 e5 2. f4 exf4 3. Qf3
BASIC=False
[KGA: Carrera (Basman) gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 d1e2
PGN=1. e4 e5 2. f4 exf4 3. Qe2
BASIC=False
[KGA: Cochrane gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 f4f3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 f3
BASIC=False
[KGA: Cunningham defence]
ECO=C35
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 f8e7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 Be7
BASIC=False
[KGA: Cunningham, Bertin gambit]
ECO=C35
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 e7h4 g2g3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3
BASIC=False
[KGA: Cunningham, Euwe defence]
ECO=C35
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 g8f6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Nf6
BASIC=False
[KGA: Cunningham, three pawns gambit]
ECO=C35
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 e7h4 g2g3 f4g3 e1g1 g3h2 g1h1
PGN=1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3 fxg3 6. O-O gxh2+ 7. Kh1
BASIC=False
[KGA: Fischer defence]
ECO=C34
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 d7d6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 d6
BASIC=False
[KGA: Ghulam Kassim gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 d2d4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4
BASIC=False
[KGA: Gianutio counter-gambit]
ECO=C34
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 f7f5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 f5
BASIC=False
[KGA: Greco gambit]
ECO=C38
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 h2h4 h7h6 d2d4 d7d6 b1c3 c7c6 h4g5 h6g5 h1h8 g7h8 f3e5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4 h6 6. d4 d6 7. Nc3 c6 8. hxg5 hxg5 9. Rxh8 Bxh8 10. Ne5
BASIC=False
[KGA: Hanstein gambit]
ECO=C38
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 e1g1
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. O-O
BASIC=False
[KGA: Herzfeld gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 b8c6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nc6
BASIC=False
[KGA: Keres (Mason-Steinitz) gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 b1c3
PGN=1. e4 e5 2. f4 exf4 3. Nc3
BASIC=False
[KGA: Kieseritsky, Berlin defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6
BASIC=False
[KGA: Kieseritsky, Berlin defence, 6.Bc4]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4
BASIC=False
[KGA: Kieseritsky, Berlin defence, Riviere variation]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 e5g4 d7d5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5
BASIC=False
[KGA: Kieseritsky, Brentano (Campbell) defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5
BASIC=False
[KGA: Kieseritsky, Brentano defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5 d2d4 g8f6 c1f4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4
BASIC=False
[KGA: Kieseritsky, Brentano defence, Caro variation]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5 d2d4 g8f6 c1f4 f6e4 b1d2
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4 Nxe4 8. Nd2
BASIC=False
[KGA: Kieseritsky, Brentano defence, Kaplanek variation]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5 d2d4 g8f6 e4d5 d8d5 b1c3 f8b4 e1f2
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. exd5 Qxd5 8. Nc3 Bb4 9. Kf2
BASIC=False
[KGA: Kieseritsky, Kolisch defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d6
BASIC=False
[KGA: Kieseritsky, Neumann defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 b8c6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nc6
BASIC=False
[KGA: Kieseritsky, Paulsen defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 f8g7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Bg7
BASIC=False
[KGA: Kieseritsky, Polerio defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 f8e7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Be7
BASIC=False
[KGA: Kieseritsky, Rice gambit]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6 e1g1
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. O-O
BASIC=False
[KGA: Kieseritsky, Salvio (Rosenthal) defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d8e7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7
BASIC=False
[KGA: Kieseritsky, Salvio defence, Cozio variation]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d8e7 d2d4 f7f5 f1c4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7 6. d4 f5 7. Bc4
BASIC=False
[KGA: Kieseritsky, long whip (Stockwhip, classical) defence]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 h7h5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5
BASIC=False
[KGA: Kieseritsky, long whip defence, Jaenisch variation]
ECO=C39
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 h7h5 f1c4 h8h7 d2d4 f8h6 b1c3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5 6. Bc4 Rh7 7. d4 Bh6 8. Nc3
BASIC=False
[KGA: King's knight's gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4
BASIC=False
[KGA: Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1e2
PGN=1. e4 e5 2. f4 exf4 3. Be2
BASIC=False
[KGA: Lolli gambit (wild Muzio gambit)]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 c4f7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+
BASIC=False
[KGA: Lolli gambit, Young variation]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 c4f7 e8f7 e1g1 g4f3 d1f3 d8f6 d2d4 f6d4 c1e3 d4f6 b1c3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+ Kxf7 6. O-O gxf3 7. Qxf3 Qf6 8. d4 Qxd4+ 9. Be3 Qf6 10. Nc3
BASIC=False
[KGA: Lopez-Gianutio counter-gambit, Hein variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 f7f5 d1e2 d8h4 e1d1 f5e4 b1c3 e8d8
PGN=1. e4 e5 2. f4 exf4 3. Bc4 f5 4. Qe2 Qh4+ 5. Kd1 fxe4 6. Nc3 Kd8
BASIC=False
[KGA: MacDonnell gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 b1c3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Nc3
BASIC=False
[KGA: Muzio gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O
BASIC=False
[KGA: Muzio gambit, Brentano defence]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 d7d5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O d5
BASIC=False
[KGA: Muzio gambit, From defence]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8e7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qe7
BASIC=False
[KGA: Muzio gambit, Holloway defence]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 b8c6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Nc6
BASIC=False
[KGA: Muzio gambit, Kling and Horwitz counter-attack]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 d8e7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O Qe7
BASIC=False
[KGA: Muzio gambit, Paulsen variation]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 e4e5 f6e5 d2d3 f8h6 b1c3 g8e7 c1d2 b8c6 a1e1
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5 8. d3 Bh6 9. Nc3 Ne7 10. Bd2 Nbc6 11. Rae1
BASIC=False
[KGA: Orsini gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 b2b3
PGN=1. e4 e5 2. f4 exf4 3. b3
BASIC=False
[KGA: Pawn's gambit (Stamma gambit)]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 h2h4
PGN=1. e4 e5 2. f4 exf4 3. h4
BASIC=False
[KGA: Philidor gambit]
ECO=C38
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 h2h4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4
BASIC=False
[KGA: Philidor gambit, Schultz variation]
ECO=C38
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 h2h4 h7h6 d2d4 d7d6 d1d3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4 h6 6. d4 d6 7. Qd3
BASIC=False
[KGA: Quaade gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 b1c3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Nc3
BASIC=False
[KGA: Rosentreter gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4
BASIC=False
[KGA: Salvio gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5
BASIC=False
[KGA: Salvio gambit, Anderssen counter-attack]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6 d2d4 d7d6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 d6
BASIC=False
[KGA: Schallop defence]
ECO=C34
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g8f6
PGN=1. e4 e5 2. f4 exf4 3. Nf3 Nf6
BASIC=False
[KGA: Schurig gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1d3
PGN=1. e4 e5 2. f4 exf4 3. Bd3
BASIC=False
[KGA: Silberschmidt gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6 d2d4 f4f3
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 f3
BASIC=False
[KGA: Soerensen gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f3e5
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Ne5
BASIC=False
[KGA: Tumbleweed gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 e1f2
PGN=1. e4 e5 2. f4 exf4 3. Kf2
BASIC=False
[KGA: Villemson (Steinitz) gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 d2d4
PGN=1. e4 e5 2. f4 exf4 3. d4
BASIC=False
[KGA: bishop's gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4
PGN=1. e4 e5 2. f4 exf4 3. Bc4
BASIC=False
[KGA: bishop's gambit, Anderssen variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 c7c6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 c6
BASIC=False
[KGA: bishop's gambit, Bledow variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d7d5
PGN=1. e4 e5 2. f4 exf4 3. Bc4 d5
BASIC=False
[KGA: bishop's gambit, Boden defence]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 b8c6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Nc6
BASIC=False
[KGA: bishop's gambit, Bogolyubov variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3
BASIC=False
[KGA: bishop's gambit, Boren-Svenonius variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 d8h4 e1f1 f8d6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Qh4+ 5. Kf1 Bd6
BASIC=False
[KGA: bishop's gambit, Bryan counter-gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 b7b5
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 b5
BASIC=False
[KGA: bishop's gambit, Chigorin's attack]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 d7d5 c4d5 g7g5 g2g3
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 d5 5. Bxd5 g5 6. g3
BASIC=False
[KGA: bishop's gambit, Cozio (Morphy) defence]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 g8f6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Nf6
BASIC=False
[KGA: bishop's gambit, Fraser variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 g2g3 f4g3 d1f3
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. g3 fxg3 7. Qf3
BASIC=False
[KGA: bishop's gambit, Gifford variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 d8h4 e1f1 g7g5 g2g3
PGN=1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Qh4+ 5. Kf1 g5 6. g3
BASIC=False
[KGA: bishop's gambit, Greco variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 f8c5
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Bc5
BASIC=False
[KGA: bishop's gambit, Grimm attack]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 d2d4 d7d6 e4e5
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 d6 7. e5
BASIC=False
[KGA: bishop's gambit, Jaenisch variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3 c7c6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 c6
BASIC=False
[KGA: bishop's gambit, Lopez-Gianutio counter-gambit]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 f7f5
PGN=1. e4 e5 2. f4 exf4 3. Bc4 f5
BASIC=False
[KGA: bishop's gambit, Maurian defence]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 b8c6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Nc6
BASIC=False
[KGA: bishop's gambit, McDonnell attack]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 d2d4 g8e7 g2g3
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 Ne7 7. g3
BASIC=False
[KGA: bishop's gambit, Morphy variation]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 g8f6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Nf6
BASIC=False
[KGA: bishop's gambit, Paulsen attack]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3 f8b4 e4e5
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 Bb4 5. e5
BASIC=False
[KGA: bishop's gambit, Ruy Lopez defence]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 c7c6
PGN=1. e4 e5 2. f4 exf4 3. Bc4 c6
BASIC=False
[KGA: bishop's gambit, Steinitz defence]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 g8e7
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Ne7
BASIC=False
[KGA: bishop's gambit, classical defence]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5
BASIC=False
[KGA: bishop's gambit, classical defence, Cozio attack]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 d1f3
PGN=1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Qf3
BASIC=False
[KGA: double Muzio gambit]
ECO=C37
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 e4e5 f6e5 c4f7
PGN=1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5 8. Bxf7+
BASIC=False
[KGD: 2...Nf6]
ECO=C30
A1H8=e2e4 e7e5 f2f4 g8f6
PGN=1. e4 e5 2. f4 Nf6
BASIC=False
[KGD: Falkbeer counter-gambit]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5
PGN=1. e4 e5 2. f4 d5
BASIC=False
[KGD: Falkbeer, 3...e4]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4
PGN=1. e4 e5 2. f4 d5 3. exd5 e4
BASIC=False
[KGD: Falkbeer, 4.d3]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3
BASIC=False
[KGD: Falkbeer, 5.de]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4
BASIC=False
[KGD: Falkbeer, Alapin variation]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c5f2 e1d1 d8d5 f3d2
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf2+ 8. Kd1 Qxd5+ 9. Nfd2
BASIC=False
[KGD: Falkbeer, Charousek gambit]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 d1e2
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2
BASIC=False
[KGD: Falkbeer, Charousek variation]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 d1e2 d8d5 b1d2 f7f5 g2g4
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2 Qxd5 7. Nd2 f5 8. g4
BASIC=False
[KGD: Falkbeer, Keres variation]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 b1d2
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nd2
BASIC=False
[KGD: Falkbeer, Milner-Barry variation]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 b1c3
PGN=1. e4 e5 2. f4 d5 3. Nc3
BASIC=False
[KGD: Falkbeer, Morphy gambit]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 b1c3 f8b4 c1d2 e4e3
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nc3 Bb4 6. Bd2 e3
BASIC=False
[KGD: Falkbeer, Nimzovich variation]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 f1b5
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. Bb5+
BASIC=False
[KGD: Falkbeer, Reti variation]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d1e2
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Qe2
BASIC=False
[KGD: Falkbeer, Rubinstein variation]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 b1c3 g8f6 d1e2
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. Qe2
BASIC=False
[KGD: Falkbeer, Tarrasch variation]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c8f5 g2g4 e8g8
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5 8. g4 O-O
BASIC=False
[KGD: Falkbeer, Tartakower variation]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 g1f3
PGN=1. e4 e5 2. f4 d5 3. Nf3
BASIC=False
[KGD: Falkbeer, main line, 7...Bf5]
ECO=C32
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c8f5
PGN=1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5
BASIC=False
[KGD: Keene's defence]
ECO=C30
A1H8=e2e4 e7e5 f2f4 d8h4 g2g3 h4e7
PGN=1. e4 e5 2. f4 Qh4+ 3. g3 Qe7
BASIC=False
[KGD: Mafia defence]
ECO=C30
A1H8=e2e4 e7e5 f2f4 c7c5
PGN=1. e4 e5 2. f4 c5
BASIC=False
[KGD: Nimzovich counter-gambit]
ECO=C31
A1H8=e2e4 e7e5 f2f4 d7d5 e4d5 c7c6
PGN=1. e4 e5 2. f4 d5 3. exd5 c6
BASIC=False
[KGD: Norwalde variation]
ECO=C30
A1H8=e2e4 e7e5 f2f4 d8f6
PGN=1. e4 e5 2. f4 Qf6
BASIC=False
[KGD: Norwalde variation, Buecker gambit]
ECO=C30
A1H8=e2e4 e7e5 f2f4 d8f6 g1f3 f6f4 b1c3 f8b4 f1c4
PGN=1. e4 e5 2. f4 Qf6 3. Nf3 Qxf4 4. Nc3 Bb4 5. Bc4
BASIC=False
[KGD: classical counter-gambit]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 f7f5
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5
BASIC=False
[KGD: classical variation]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5
PGN=1. e4 e5 2. f4 Bc5
BASIC=False
[KGD: classical, 4.c3]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3
BASIC=False
[KGD: classical, Hanham variation]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 b1c3 b8d7
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nd7
BASIC=False
[KGD: classical, Heath variation]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 b2b4
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. b4
BASIC=False
[KGD: classical, Marshall attack]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 c8g4 f4e5 d6e5 d1a4
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 Bg4 5. fxe5 dxe5 6. Qa4+
BASIC=False
[KGD: classical, Reti variation]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 f7f5 f4e5 d6e5 d2d4 e5d4 f1c4
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 5. fxe5 dxe5 6. d4 exd4 7. Bc4
BASIC=False
[KGD: classical, Soldatenkov variation]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 f4e5
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. fxe5
BASIC=False
[KGD: classical, Svenonius variation]
ECO=C30
A1H8=e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 b1c3 g8f6 f1c4 b8c6 d2d3 c8g4 h2h3 g4f3 d1f3 e5f4
PGN=1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nf6 5. Bc4 Nc6 6. d3 Bg4 7. h3 Bxf3 8. Qxf3 exf4
BASIC=False
[KP: Colorado counter]
ECO=B00
A1H8=e2e4 b8c6 g1f3 f7f5
PGN=1. e4 Nc6 2. Nf3 f5
BASIC=False
[KP: Indian opening]
ECO=C20
A1H8=e2e4 e7e5 d2d3
PGN=1. e4 e5 2. d3
BASIC=False
[KP: King's head opening]
ECO=C20
A1H8=e2e4 e7e5 f2f3
PGN=1. e4 e5 2. f3
BASIC=False
[KP: Lopez opening]
ECO=C20
A1H8=e2e4 e7e5 c2c3
PGN=1. e4 e5 2. c3
BASIC=False
[KP: Mengarini's opening]
ECO=C20
A1H8=e2e4 e7e5 a2a3
PGN=1. e4 e5 2. a3
BASIC=False
[KP: Napoleon's opening]
ECO=C20
A1H8=e2e4 e7e5 d1f3
PGN=1. e4 e5 2. Qf3
BASIC=False
[KP: Neo-Mongoloid defence]
ECO=B00
A1H8=e2e4 b8c6 d2d4 f7f6
PGN=1. e4 Nc6 2. d4 f6
BASIC=False
[KP: Nimzovich defence]
ECO=B00
A1H8=e2e4 b8c6
PGN=1. e4 Nc6
BASIC=False
[KP: Nimzovich defence, Bogolyubov variation]
ECO=B00
A1H8=e2e4 b8c6 d2d4 d7d5 b1c3
PGN=1. e4 Nc6 2. d4 d5 3. Nc3
BASIC=False
[KP: Nimzovich defence, Marshall gambit]
ECO=B00
A1H8=e2e4 b8c6 d2d4 d7d5 e4d5 d8d5 b1c3
PGN=1. e4 Nc6 2. d4 d5 3. exd5 Qxd5 4. Nc3
BASIC=False
[KP: Nimzovich defence, Wheeler gambit]
ECO=B00
A1H8=e2e4 b8c6 b2b4 c6b4 c2c3 b4c6 d2d4
PGN=1. e4 Nc6 2. b4 Nxb4 3. c3 Nc6 4. d4
BASIC=False
[KP: Patzer opening]
ECO=C20
A1H8=e2e4 e7e5 d1h5
PGN=1. e4 e5 2. Qh5
BASIC=False
[Kevitz-Trajkovich defence]
ECO=A50
A1H8=d2d4 g8f6 c2c4 b8c6
PGN=1. d4 Nf6 2. c4 Nc6
BASIC=False
[King's Indian defence]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6
PGN=1. d4 Nf6 2. c4 g6
BASIC=True
[King's Indian defence, 3.Nc3]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3
BASIC=True
[King's Indian with e4 & g3]
ECO=E72
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g2g3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3
BASIC=False
[King's Indian, 3.Nf3]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g1f3
PGN=1. d4 Nf6 2. c4 g6 3. Nf3
BASIC=False
[King's Indian: 3.g3]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3
PGN=1. d4 Nf6 2. c4 g6 3. g3
BASIC=False
[King's Indian: 3.g3, counterthrust variation]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 d7d5
PGN=1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5
BASIC=False
[King's Indian: 4.e4]
ECO=E70
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4
BASIC=False
[King's Indian: 5.Be2]
ECO=E73
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2
BASIC=False
[King's Indian: 5.Nf3]
ECO=E90
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3
BASIC=False
[King's Indian: 6.Be2]
ECO=E91
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2
BASIC=False
[King's Indian: Andersson variation]
ECO=E92
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4e5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5
BASIC=False
[King's Indian: Anti-Gruenfeld]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 d4d5
PGN=1. d4 Nf6 2. c4 g6 3. d5
BASIC=False
[King's Indian: Averbakh system]
ECO=E73
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5
BASIC=False
[King's Indian: Averbakh, 6...c5]
ECO=E74
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5
BASIC=False
[King's Indian: Averbakh, main line]
ECO=E75
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5 d4d5 e7e6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6
BASIC=False
[King's Indian: Danube gambit]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 d4d5 b7b5
PGN=1. d4 Nf6 2. c4 g6 3. d5 b5
BASIC=False
[King's Indian: East Indian defence]
ECO=A48
A1H8=d2d4 g8f6 g1f3 g7g6
PGN=1. d4 Nf6 2. Nf3 g6
BASIC=False
[King's Indian: Four pawns attack]
ECO=E76
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4
BASIC=False
[King's Indian: Four pawns attack, 6.Be2]
ECO=E77
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 f1e2
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2
BASIC=False
[King's Indian: Four pawns attack, Florentine gambit]
ECO=E77
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 f1e2 c7c5 d4d5 e7e6 g1f3 e6d5 e4e5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. Nf3 exd5 9. e5
BASIC=False
[King's Indian: Four pawns attack, dynamic line]
ECO=E76
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5
BASIC=False
[King's Indian: Four pawns attack, main line]
ECO=E79
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 f1e2 c7c5 g1f3 c5d4 f3d4 b8c6 c1e3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be3
BASIC=False
[King's Indian: Four pawns attack, with Be2 and Nf3]
ECO=E78
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 f1e2 c7c5 g1f3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. Nf3
BASIC=False
[King's Indian: Gligoric-Taimanov system]
ECO=E92
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 c1e3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3
BASIC=False
[King's Indian: Kazakh variation]
ECO=E91
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 b8a6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6
BASIC=False
[King's Indian: Kramer system]
ECO=E70
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1e2
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2
BASIC=False
[King's Indian: Larsen variation]
ECO=E90
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 c1e3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be3
BASIC=False
[King's Indian: London system]
ECO=A48
A1H8=d2d4 g8f6 g1f3 g7g6 c1f4
PGN=1. d4 Nf6 2. Nf3 g6 3. Bf4
BASIC=False
[King's Indian: Makagonov system (5.h3)]
ECO=E71
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 h2h3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3
BASIC=False
[King's Indian: Petrosian system]
ECO=E92
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5
BASIC=False
[King's Indian: Petrosian system, Keres variation]
ECO=E93
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 b8d7 c1g5 h7h6 g5h4 g6g5 h4g3 f6h5 h2h4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 8. Bg5 h6 9. Bh4 g5 10. Bg3 Nh5 11. h4
BASIC=False
[King's Indian: Petrosian system, Stein variation]
ECO=E92
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 a7a5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 a5
BASIC=False
[King's Indian: Petrosian system, main line]
ECO=E93
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 b8d7
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7
BASIC=False
[King's Indian: Pomar system]
ECO=E72
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g2g3 e8g8 f1g2 e7e5 g1e2
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 O-O 6. Bg2 e5 7. Nge2
BASIC=False
[King's Indian: Saemisch variation]
ECO=E80
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3
BASIC=False
[King's Indian: Saemisch, 5...O-O]
ECO=E81
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O
BASIC=False
[King's Indian: Saemisch, 6...Nc6]
ECO=E83
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6
BASIC=False
[King's Indian: Saemisch, Byrne variation]
ECO=E81
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 c7c6 f1d3 a7a6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c6 7. Bd3 a6
BASIC=False
[King's Indian: Saemisch, Panno formation]
ECO=E83
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a7a6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6
BASIC=False
[King's Indian: Saemisch, Panno main line]
ECO=E84
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a7a6 d1d2 a8b8
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Rb8
BASIC=False
[King's Indian: Saemisch, Ruban variation]
ECO=E83
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a8b8
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 Rb8
BASIC=False
[King's Indian: Saemisch, double fianchetto variation]
ECO=E82
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b7b6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 b6
BASIC=False
[King's Indian: Saemisch, orthodox main line]
ECO=E89
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 c7c6 g1e2 c6d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 c6 8. Nge2 cxd5
BASIC=False
[King's Indian: Saemisch, orthodox variation]
ECO=E85
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5
BASIC=False
[King's Indian: Saemisch, orthodox, 7.Nge2 c6]
ECO=E86
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 g1e2 c7c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6
BASIC=False
[King's Indian: Saemisch, orthodox, 7.d5]
ECO=E87
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5
BASIC=False
[King's Indian: Saemisch, orthodox, 7.d5 c6]
ECO=E88
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 c7c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 c6
BASIC=False
[King's Indian: Saemisch, orthodox, Bronstein variation]
ECO=E87
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 f6h5 d1d2 d8h4 g2g3 h5g3 d2f2 g3f1 f2h4 f1e3 e1e2 e3c4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2 Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2 Nxc4
BASIC=False
[King's Indian: Semi-Averbakh system]
ECO=E73
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1e3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Be3
BASIC=False
[King's Indian: Six pawns attack]
ECO=E77
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 f1e2 c7c5 d4d5 e7e6 d5e6 f7e6 g2g4 b8c6 h2h4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. dxe6 fxe6 9. g4 Nc6 10. h4
BASIC=False
[King's Indian: Smyslov system]
ECO=E61
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 c1g5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5
BASIC=False
[King's Indian: Torre attack]
ECO=A48
A1H8=d2d4 g8f6 g1f3 g7g6 c1g5
PGN=1. d4 Nf6 2. Nf3 g6 3. Bg5
BASIC=False
[King's Indian: Zinnowitz variation]
ECO=E90
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 c1g5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5
BASIC=False
[King's Indian: accelerated Averbakh system]
ECO=E70
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 c1g5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5
BASIC=False
[King's Indian: classical variation]
ECO=E92
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5
BASIC=False
[King's Indian: fianchetto variation]
ECO=E62
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3
BASIC=False
[King's Indian: fianchetto with ...Nc6]
ECO=E62
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6
BASIC=False
[King's Indian: fianchetto with ...Nd7]
ECO=E67
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8d7
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7
BASIC=False
[King's Indian: fianchetto without c4]
ECO=A49
A1H8=d2d4 g8f6 g1f3 g7g6 g2g3
PGN=1. d4 Nf6 2. Nf3 g6 3. g3
BASIC=False
[King's Indian: fianchetto, Kavalek (Bronstein) variation]
ECO=E62
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c6 e1g1 d8a5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Qa5
BASIC=False
[King's Indian: fianchetto, Larsen system]
ECO=E62
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c6 e1g1 c8f5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Bf5
BASIC=False
[King's Indian: fianchetto, Panno variation]
ECO=E63
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8c6 e1g1 a7a6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O a6
BASIC=False
[King's Indian: fianchetto, Simagin variation]
ECO=E62
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8c6 e1g1 c8g4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bg4
BASIC=False
[King's Indian: fianchetto, Uhlmann (Szabo) variation]
ECO=E62
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8c6 e1g1 e7e5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O e5
BASIC=False
[King's Indian: fianchetto, Yugoslav Panno]
ECO=E66
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c5 e1g1 b8c6 d4d5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c5 7. O-O Nc6 8. d5
BASIC=False
[King's Indian: fianchetto, Yugoslav system]
ECO=E64
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c5
BASIC=False
[King's Indian: fianchetto, Yugoslav, 7.O-O]
ECO=E65
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c5 e1g1
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c5 7. O-O
BASIC=False
[King's Indian: fianchetto, classical main line]
ECO=E69
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8d7 e1g1 e7e5 e2e4 c7c6 h2h3
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8. e4 c6 9. h3
BASIC=False
[King's Indian: fianchetto, classical variation]
ECO=E67
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8d7 e1g1 e7e5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5
BASIC=False
[King's Indian: fianchetto, classical variation, 8.e4]
ECO=E68
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8d7 e1g1 e7e5 e2e4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8. e4
BASIC=False
[King's Indian: fianchetto, lesser Simagin (Spassky) variation]
ECO=E62
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8c6 e1g1 c8f5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bf5
BASIC=False
[King's Indian: orthodox variation]
ECO=E94
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O
BASIC=False
[King's Indian: orthodox, 7...Nbd7]
ECO=E94
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8d7
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7
BASIC=False
[King's Indian: orthodox, 7...Nbd7, 8.Re1]
ECO=E95
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8d7 f1e1
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1
BASIC=False
[King's Indian: orthodox, 7...Nbd7, main line]
ECO=E96
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8d7 f1e1 c7c6 e2f1 a7a5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 a5
BASIC=False
[King's Indian: orthodox, Aronin-Taimanov variation]
ECO=E97
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6
BASIC=False
[King's Indian: orthodox, Aronin-Taimanov, 9.Ne1]
ECO=E98
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1
BASIC=False
[King's Indian: orthodox, Aronin-Taimanov, Benko attack]
ECO=E99
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 f2f3 f7f5 g2g4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5 11. g4
BASIC=False
[King's Indian: orthodox, Aronin-Taimanov, bayonet attack]
ECO=E97
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 b2b4
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4
BASIC=False
[King's Indian: orthodox, Aronin-Taimanov, main line]
ECO=E99
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 f2f3 f7f5
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5
BASIC=False
[King's Indian: orthodox, Donner variation]
ECO=E94
A1H8=d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 c7c6
PGN=1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O c6
BASIC=False
[King's gambit]
ECO=C30
A1H8=e2e4 e7e5 f2f4
PGN=1. e4 e5 2. f4
BASIC=False
[King's gambit accepted]
ECO=C33
A1H8=e2e4 e7e5 f2f4 e5f4
PGN=1. e4 e5 2. f4 exf4
BASIC=False
[King's knight opening]
ECO=C40
A1H8=e2e4 e7e5 g1f3
PGN=1. e4 e5 2. Nf3
BASIC=True
[King's knight's gambit]
ECO=C34
A1H8=e2e4 e7e5 f2f4 e5f4 g1f3
PGN=1. e4 e5 2. f4 exf4 3. Nf3
BASIC=False
[King's pawn game]
ECO=C20
A1H8=e2e4 e7e5
PGN=1. e4 e5
BASIC=True
[King's pawn opening]
ECO=B00
A1H8=e2e4
PGN=1. e4
BASIC=True
[Konstantinopolsky opening]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 g2g3
PGN=1. e4 e5 2. Nf3 Nc6 3. g3
BASIC=False
[Lasker simul special]
ECO=A00
A1H8=g2g3 h7h5
PGN=1. g3 h5
BASIC=False
[Latvian counter-gambit]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f5
PGN=1. e4 e5 2. Nf3 f5
BASIC=False
[Latvian gambit, 3.Bc4]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f5 f1c4
PGN=1. e4 e5 2. Nf3 f5 3. Bc4
BASIC=False
[Latvian: Behting variation]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d8g5 e5f7 g5g2 h1f1 d7d5 f7h8 g8f6
PGN=1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. Nf7 Qxg2 6. Rf1 d5 7. Nxh8 Nf6
BASIC=False
[Latvian: Fraser defence]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f5 f3e5 b8c6
PGN=1. e4 e5 2. Nf3 f5 3. Nxe5 Nc6
BASIC=False
[Latvian: Nimzovich variation]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4 f5e4 c4e3
PGN=1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Ne3
BASIC=False
[Latvian: Polerio variation]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d7d5
PGN=1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 d5
BASIC=False
[Latvian: corkscrew counter-gambit]
ECO=C40
A1H8=e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 g8f6
PGN=1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Nf6
BASIC=False
[Lemming defence]
ECO=B00
A1H8=e2e4 b8a6
PGN=1. e4 Na6
BASIC=False
[Lengfellner system]
ECO=C00
A1H8=e2e4 e7e6 d2d4 d7d6
PGN=1. e4 e6 2. d4 d6
BASIC=False
[Levitsky attack (Queen's bishop attack)]
ECO=D00
A1H8=d2d4 d7d5 c1g5
PGN=1. d4 d5 2. Bg5
BASIC=False
[Mieses opening]
ECO=A00
A1H8=d2d3
PGN=1. d3
BASIC=False
[Modern defence]
ECO=A40
A1H8=d2d4 g7g6
PGN=1. d4 g6
BASIC=False
[Modern defence: Averbakh system]
ECO=A42
A1H8=d2d4 d7d6 c2c4 g7g6 b1c3 f8g7 e2e4
PGN=1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4
BASIC=False
[Modern defence: Averbakh system, Kotov variation]
ECO=A42
A1H8=d2d4 d7d6 c2c4 g7g6 b1c3 f8g7 e2e4 b8c6
PGN=1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 Nc6
BASIC=False
[Modern defence: Averbakh system, Randspringer variation]
ECO=A42
A1H8=d2d4 d7d6 c2c4 g7g6 b1c3 f8g7 e2e4 f7f5
PGN=1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 f5
BASIC=False
[Mujannah opening]
ECO=A03
A1H8=f2f4 d7d5 c2c4
PGN=1. f4 d5 2. c4
BASIC=False
[Neo-Gruenfeld (Kemeri) defence]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5
BASIC=False
[Neo-Gruenfeld defence]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 f2f3 d7d5
PGN=1. d4 Nf6 2. c4 g6 3. f3 d5
BASIC=False
[Neo-Gruenfeld, 5.Nf3]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3
BASIC=False
[Neo-Gruenfeld, 5.cd]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 c4d5 f6d5
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cxd5 Nxd5
BASIC=False
[Neo-Gruenfeld, 5.cd, main line]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 c4d5 f6d5 e2e4 d5b6 g1e2
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2
BASIC=False
[Neo-Gruenfeld, 6.O-O]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O
BASIC=False
[Neo-Gruenfeld, 6.O-O c6]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1 c7c6
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6
BASIC=False
[Neo-Gruenfeld, 6.O-O, main line]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1 c7c6 c4d5 c6d5
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 7. cxd5 cxd5
BASIC=False
[Neo-Gruenfeld, 6.cd Nxd5, 7.O-O]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 c4d5 f6d5 e1g1
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O
BASIC=False
[Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 c4d5 f6d5 e1g1 d5b6
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O Nb6
BASIC=False
[Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 c4d5 f6d5 e1g1 c7c5 b1c3
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O c5 8. Nc3
BASIC=False
[Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 c4d5 f6d5 e1g1 c7c5 d4c5
PGN=1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O c5 8. dxc5
BASIC=False
[Neo-Indian (Seirawan) attack]
ECO=E00
A1H8=d2d4 g8f6 c2c4 e7e6 c1g5
PGN=1. d4 Nf6 2. c4 e6 3. Bg5
BASIC=False
[Nimzo-Indian defence]
ECO=E20
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4
BASIC=True
[Nimzo-Indian: 4.e3]
ECO=E40
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3
BASIC=False
[Nimzo-Indian: 4.e3 O-O]
ECO=E46
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O
BASIC=False
[Nimzo-Indian: 4.e3 O-O, 5.Bd3]
ECO=E47
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3
BASIC=False
[Nimzo-Indian: 4.e3 O-O, 5.Bd3 d5]
ECO=E48
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5
BASIC=False
[Nimzo-Indian: 4.e3 c5]
ECO=E41
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5
BASIC=False
[Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein)]
ECO=E42
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1e2
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nge2
BASIC=False
[Nimzo-Indian: 4.e3 e8g8, 5.Nf3 d7d5]
ECO=E51
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5
BASIC=False
[Nimzo-Indian: 4.e3 e8g8, 5.Nf3, without ...d5]
ECO=E50
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3
BASIC=False
[Nimzo-Indian: 4.e3, Botvinnik system]
ECO=E49
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 a2a3 b4c3 b2c3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3
BASIC=False
[Nimzo-Indian: 4.e3, Bronstein (Byrne) variation]
ECO=E45
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2 c8a6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6
BASIC=False
[Nimzo-Indian: 4.e3, Gligoric system with 7...Nbd7]
ECO=E53
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 b8d7
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nbd7
BASIC=False
[Nimzo-Indian: 4.e3, Gligoric system with 7...dc]
ECO=E54
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 d5c4 d3c4
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8. Bxc4
BASIC=False
[Nimzo-Indian: 4.e3, Gligoric system, Bronstein variation]
ECO=E55
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 d5c4 d3c4 b8d7
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7
BASIC=False
[Nimzo-Indian: 4.e3, Gligoric system, Smyslov variation]
ECO=E54
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 d5c4 d3c4 d8e7
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Qe7
BASIC=False
[Nimzo-Indian: 4.e3, Keres variation]
ECO=E53
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 b7b6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O b6
BASIC=False
[Nimzo-Indian: 4.e3, Ragozin variation]
ECO=E51
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 b8c6 e1g1 d5c4
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 Nc6 7. O-O dxc4
BASIC=False
[Nimzo-Indian: 4.e3, Taimanov variation]
ECO=E40
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b8c6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6
BASIC=False
[Nimzo-Indian: 4.e3, main line]
ECO=E59
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 b8c6 a2a3 b4c3 b2c3 d5c4 d3c4
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4
BASIC=False
[Nimzo-Indian: 4.e3, main line with ...b6]
ECO=E52
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 b7b6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 b6
BASIC=False
[Nimzo-Indian: 4.e3, main line with ...c5]
ECO=E53
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5
BASIC=False
[Nimzo-Indian: 4.e3, main line with 7...Nc6]
ECO=E56
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 b8c6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6
BASIC=False
[Nimzo-Indian: 4.e3, main line with 8...Bxc3]
ECO=E58
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 b8c6 a2a3 b4c3 b2c3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3
BASIC=False
[Nimzo-Indian: 4.e3, main line with 8...dc and 9...cd]
ECO=E57
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 f1d3 c7c5 e1g1 b8c6 a2a3 d5c4 d3c4 c5d4
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 8. a3 dxc4 9. Bxc4 cxd4
BASIC=False
[Nimzo-Indian: Fischer variation]
ECO=E43
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6
BASIC=False
[Nimzo-Indian: Fischer variation, 5.Ne2]
ECO=E44
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2
BASIC=False
[Nimzo-Indian: Kmoch variation]
ECO=E20
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3
BASIC=False
[Nimzo-Indian: Leningrad variation]
ECO=E30
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5
BASIC=False
[Nimzo-Indian: Leningrad, ...b5 gambit]
ECO=E30
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5 h7h6 g5h4 c7c5 d4d5 b7b5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 b5
BASIC=False
[Nimzo-Indian: Leningrad, main line]
ECO=E31
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5 h7h6 g5h4 c7c5 d4d5 d7d6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6
BASIC=False
[Nimzo-Indian: Mikenas attack]
ECO=E20
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1d3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qd3
BASIC=False
[Nimzo-Indian: Reshevsky variation]
ECO=E46
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1e2
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2
BASIC=False
[Nimzo-Indian: Romanishin-Kasparov (Steiner) system]
ECO=E20
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g2g3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3
BASIC=False
[Nimzo-Indian: Saemisch variation]
ECO=E24
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3
BASIC=False
[Nimzo-Indian: Saemisch, Botvinnik variation]
ECO=E24
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 f2f3 d7d5 e2e3 e8g8 c4d5 f6d5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. e3 O-O 8. cxd5 Nxd5
BASIC=False
[Nimzo-Indian: Saemisch, Capablanca variation]
ECO=E29
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 e8g8 e2e3 c7c5 f1d3 b8c6 g1e2 b7b6 e3e4 f6e8
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. e3 c5 7. Bd3 Nc6 8. Ne2 b6 9. e4 Ne8
BASIC=False
[Nimzo-Indian: Saemisch, Keres variation]
ECO=E25
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 f2f3 d7d5 c4d5 f6d5 d4c5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. cxd5 Nxd5 8. dxc5
BASIC=False
[Nimzo-Indian: Saemisch, O'Kelly variation]
ECO=E26
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 e2e3 b7b6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 b6
BASIC=False
[Nimzo-Indian: Saemisch, Romanovsky variation]
ECO=E25
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 f2f3 d7d5 c4d5 f6d5 d4c5 f7f5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. cxd5 Nxd5 8. dxc5 f5
BASIC=False
[Nimzo-Indian: Saemisch, main line]
ECO=E29
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 e8g8 e2e3 c7c5 f1d3 b8c6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. e3 c5 7. Bd3 Nc6
BASIC=False
[Nimzo-Indian: Simagin variation]
ECO=E46
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1e2 d7d5 a2a3 b4d6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2 d5 6. a3 Bd6
BASIC=False
[Nimzo-Indian: Spielmann variation]
ECO=E22
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3
BASIC=False
[Nimzo-Indian: Spielmann, 4...c5, 5.dc Nc6]
ECO=E23
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6
BASIC=False
[Nimzo-Indian: Spielmann, Karlsbad variation]
ECO=E23
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4d2
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxd2
BASIC=False
[Nimzo-Indian: Spielmann, San Remo variation]
ECO=E23
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4c5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5
BASIC=False
[Nimzo-Indian: Spielmann, Staahlberg variation]
ECO=E23
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4c5 b3c2 f7f5 g2g3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5 8. Qc2 f5 9. g3
BASIC=False
[Nimzo-Indian: classical variation]
ECO=E32
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2
BASIC=False
[Nimzo-Indian: classical, 4...Nc6]
ECO=E33
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6
BASIC=False
[Nimzo-Indian: classical, 4...c5]
ECO=E38
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5
BASIC=False
[Nimzo-Indian: classical, Adorjan gambit]
ECO=E32
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 e8g8 a2a3 b4c3 c2c3 b7b5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5
BASIC=False
[Nimzo-Indian: classical, Botvinnik variation]
ECO=E36
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 b8c6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Nc6
BASIC=False
[Nimzo-Indian: classical, Milner-Barry (Zurich) variation]
ECO=E33
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6 g1f3 d7d6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6
BASIC=False
[Nimzo-Indian: classical, Noa variation]
ECO=E34
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5
BASIC=False
[Nimzo-Indian: classical, Noa variation, 5.a3]
ECO=E36
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3
BASIC=False
[Nimzo-Indian: classical, Noa variation, 5.cd ed]
ECO=E35
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5
BASIC=False
[Nimzo-Indian: classical, Noa variation, main line]
ECO=E36
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4
BASIC=False
[Nimzo-Indian: classical, Noa variation, main line, 7.Qc2]
ECO=E37
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4 c3c2
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2
BASIC=False
[Nimzo-Indian: classical, Pirc variation]
ECO=E39
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5 d4c5 e8g8
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O
BASIC=False
[Nimzo-Indian: classical, San Remo variation]
ECO=E37
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4 c3c2 b8c6 e2e3 e6e5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 Nc6 8. e3 e5
BASIC=False
[Nimzo-Indian: e3, Huebner variation]
ECO=E41
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 g1f3 b4c3 b2c3 d7d6
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6
BASIC=False
[Nimzo-Indian: three knights variation]
ECO=E21
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3
BASIC=False
[Nimzo-Indian: three knights, Euwe variation]
ECO=E21
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 d4d5 f6e4
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 Ne4
BASIC=False
[Nimzo-Indian: three knights, Korchnoi variation]
ECO=E21
A1H8=d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 d4d5
PGN=1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5
BASIC=False
[Nimzovich-Larsen attack]
ECO=A01
A1H8=b2b3
PGN=1. b3
BASIC=False
[Nimzovich-Larsen attack: Dutch variation]
ECO=A01
A1H8=b2b3 f7f5
PGN=1. b3 f5
BASIC=False
[Nimzovich-Larsen attack: English variation]
ECO=A01
A1H8=b2b3 c7c5
PGN=1. b3 c5
BASIC=False
[Nimzovich-Larsen attack: Indian variation]
ECO=A01
A1H8=b2b3 g8f6
PGN=1. b3 Nf6
BASIC=False
[Nimzovich-Larsen attack: Polish variation]
ECO=A01
A1H8=b2b3 b7b5
PGN=1. b3 b5
BASIC=False
[Nimzovich-Larsen attack: classical variation]
ECO=A01
A1H8=b2b3 d7d5
PGN=1. b3 d5
BASIC=False
[Nimzovich-Larsen attack: modern variation]
ECO=A01
A1H8=b2b3 e7e5
PGN=1. b3 e5
BASIC=False
[Nimzovich-Larsen attack: symmetrical variation]
ECO=A01
A1H8=b2b3 b7b6
PGN=1. b3 b6
BASIC=False
[Norwegian defence]
ECO=B06
A1H8=e2e4 g7g6 d2d4 g8f6 e4e5 f6h5 g2g4 h5g7
PGN=1. e4 g6 2. d4 Nf6 3. e5 Nh5 4. g4 Ng7
BASIC=False
[Novosibirsk opening]
ECO=A00
A1H8=b1c3 c7c5 d2d4 c5d4 d1d4 b8c6 d4h4
PGN=1. Nc3 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qh4
BASIC=False
[Old Benoni defence]
ECO=A43
A1H8=d2d4 c7c5
PGN=1. d4 c5
BASIC=False
[Old Benoni: Franco-Benoni defence]
ECO=A43
A1H8=d2d4 c7c5 d4d5 e7e6 e2e4
PGN=1. d4 c5 2. d5 e6 3. e4
BASIC=False
[Old Benoni: Mujannah formation]
ECO=A43
A1H8=d2d4 c7c5 d4d5 f7f5
PGN=1. d4 c5 2. d5 f5
BASIC=False
[Old Benoni: Schmid's system]
ECO=A43
A1H8=d2d4 c7c5 d4d5 d7d6 b1c3 g7g6
PGN=1. d4 c5 2. d5 d6 3. Nc3 g6
BASIC=False
[Old Indian defence]
ECO=A41
A1H8=d2d4 d7d6 c2c4
PGN=1. d4 d6 2. c4
BASIC=False
[Old Indian: Dus-Khotimirsky variation]
ECO=A54
A1H8=d2d4 g8f6 c2c4 d7d6 b1c3 e7e5 e2e3 b8d7 f1d3
PGN=1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3
BASIC=False
[Old Indian: Janowski variation]
ECO=A53
A1H8=d2d4 g8f6 c2c4 d7d6 b1c3 c8f5
PGN=1. d4 Nf6 2. c4 d6 3. Nc3 Bf5
BASIC=False
[Old Indian: Tartakower (Wade) variation]
ECO=A41
A1H8=d2d4 d7d6 g1f3 c8g4
PGN=1. d4 d6 2. Nf3 Bg4
BASIC=False
[Old Indian: Ukrainian variation]
ECO=A54
A1H8=d2d4 g8f6 c2c4 d7d6 b1c3 e7e5
PGN=1. d4 Nf6 2. c4 d6 3. Nc3 e5
BASIC=False
[Old Indian: Ukrainian variation, 4.Nf3]
ECO=A54
A1H8=d2d4 g8f6 c2c4 d7d6 b1c3 e7e5 g1f3
PGN=1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3
BASIC=False
[Old Indian: main line]
ECO=A55
A1H8=d2d4 g8f6 c2c4 d7d6 b1c3 e7e5 g1f3 b8d7 e2e4
PGN=1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. e4
BASIC=False
[Owen defence]
ECO=B00
A1H8=e2e4 b7b6
PGN=1. e4 b6
BASIC=False
[Paleface attack]
ECO=A45
A1H8=d2d4 g8f6 f2f3
PGN=1. d4 Nf6 2. f3
BASIC=False
[Petrov three knights game]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 b1c3
PGN=1. e4 e5 2. Nf3 Nf6 3. Nc3
BASIC=False
[Petrov's defence]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6
PGN=1. e4 e5 2. Nf3 Nf6
BASIC=True
[Petrov: Cochrane gambit]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f7
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7
BASIC=False
[Petrov: Cozio (Lasker) attack]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d1e2
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2
BASIC=False
[Petrov: Damiano variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 f6e4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4
BASIC=False
[Petrov: French attack]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d3
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3
BASIC=False
[Petrov: Italian variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f1c4
PGN=1. e4 e5 2. Nf3 Nf6 3. Bc4
BASIC=False
[Petrov: Kaufmann attack]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 c2c4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. c4
BASIC=False
[Petrov: Nimzovich attack]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 b1c3
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3
BASIC=False
[Petrov: Paulsen attack]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5c4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nc4
BASIC=False
[Petrov: Urusov gambit]
ECO=C43
A1H8=e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 f1c4
PGN=1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. Bc4
BASIC=False
[Petrov: classical attack]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4
BASIC=False
[Petrov: classical attack, Berger variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1 c8g4 c2c3 f7f5 b1d2
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2
BASIC=False
[Petrov: classical attack, Chigorin variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1
BASIC=False
[Petrov: classical attack, Jaenisch variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 c2c4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. c4
BASIC=False
[Petrov: classical attack, Krause variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1 c8g4 c2c3 f7f5 c3c4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. c4
BASIC=False
[Petrov: classical attack, Maroczy variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1 c8g4 c2c3 f7f5 c3c4 e7h4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. c4 Bh4
BASIC=False
[Petrov: classical attack, Marshall trap]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c8g4 c4d5 f7f5 f1e1 d6h2
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+
BASIC=False
[Petrov: classical attack, Marshall variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6
BASIC=False
[Petrov: classical attack, Mason variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 e8g8
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O
BASIC=False
[Petrov: classical attack, Tarrasch variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c8g4
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4
BASIC=False
[Petrov: classical attack, close variation]
ECO=C42
A1H8=e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 e4f6
PGN=1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 Nf6
BASIC=False
[Petrov: modern (Steinitz) attack]
ECO=C43
A1H8=e2e4 e7e5 g1f3 g8f6 d2d4
PGN=1. e4 e5 2. Nf3 Nf6 3. d4
BASIC=False
[Petrov: modern attack, Bardeleben variation]
ECO=C43
A1H8=e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1e2 e4c5 f3d4 b8c6
PGN=1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6
BASIC=False
[Petrov: modern attack, Steinitz variation]
ECO=C43
A1H8=e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1e2
PGN=1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2
BASIC=False
[Petrov: modern attack, Symmetrical variation]
ECO=C43
A1H8=e2e4 e7e5 g1f3 g8f6 d2d4 f6e4
PGN=1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4
BASIC=False
[Petrov: modern attack, Trifunovic variation]
ECO=C43
A1H8=e2e4 e7e5 g1f3 g8f6 d2d4 f6e4 f1d3 d7d5 f3e5 f8d6 e1g1 e8g8 c2c4 d6e5
PGN=1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Bd6 6. O-O O-O 7. c4 Bxe5
BASIC=False
[Petrov: modern attack, main line]
ECO=C43
A1H8=e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1d4
PGN=1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4
BASIC=False
[Philidor's defence]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6
PGN=1. e4 e5 2. Nf3 d6
BASIC=True
[Philidor: Berger variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g8f6 b1c3 f8e7 f1e2 e8g8 e1g1 c7c5 d4f3 b8c6 c1g5 c8e6 f1e1
PGN=1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 O-O 7. O-O c5 8. Nf3 Nc6 9. Bg5 Be6 10. Re1
BASIC=False
[Philidor: Boden variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 d1d4 c8d7
PGN=1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Qxd4 Bd7
BASIC=False
[Philidor: Hanham variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 b8d7
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nd7
BASIC=False
[Philidor: Hanham, Berger variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 f3g5 g8h6 f2f4 f8e7 e1g1 e8g8 c2c3 d6d5
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Ng5 Nh6 6. f4 Be7 7. O-O O-O 8. c3 d5
BASIC=False
[Philidor: Hanham, Delmar variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 c2c3
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. c3
BASIC=False
[Philidor: Hanham, Kmoch variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 f3g5
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Ng5
BASIC=False
[Philidor: Hanham, Krause variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 e1g1
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O
BASIC=False
[Philidor: Hanham, Schlechter variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 b1c3
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Nc3
BASIC=False
[Philidor: Hanham, Steiner variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 e1g1 f8e7 d4e5
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O Be7 6. dxe5
BASIC=False
[Philidor: Improved Hanham variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7
BASIC=False
[Philidor: Larsen variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g7g6
PGN=1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 g6
BASIC=False
[Philidor: Lopez counter-gambit]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 f1c4 f7f5
PGN=1. e4 e5 2. Nf3 d6 3. Bc4 f5
BASIC=False
[Philidor: Lopez counter-gambit, Jaenisch variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 f1c4 f7f5 d2d4 e5d4 f3g5 g8h6 g5h7
PGN=1. e4 e5 2. Nf3 d6 3. Bc4 f5 4. d4 exd4 5. Ng5 Nh6 6. Nxh7
BASIC=False
[Philidor: Nimzovich (Jaenisch) variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6
BASIC=False
[Philidor: Nimzovich variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5
BASIC=False
[Philidor: Nimzovich, Klein variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 f1c4
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Bc4
BASIC=False
[Philidor: Nimzovich, Larobok variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 f3g5 e8g8 c4f7
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+
BASIC=False
[Philidor: Nimzovich, Locock variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 f3g5
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Ng5
BASIC=False
[Philidor: Nimzovich, Rellstab variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5 f6e4 d1d5
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Qd5
BASIC=False
[Philidor: Nimzovich, Sokolsky variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5 f6e4 b1d2
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Nbd2
BASIC=False
[Philidor: Nimzovich, Sozin variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 e1g1 e8g8 d1e2 c7c6 a2a4 e5d4
PGN=1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. O-O O-O 7. Qe2 c6 8. a4 exd4
BASIC=False
[Philidor: Paulsen attack]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 d6d5 e4d5
PGN=1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 d5 5. exd5
BASIC=False
[Philidor: Philidor counter-gambit]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 f7f5
PGN=1. e4 e5 2. Nf3 d6 3. d4 f5
BASIC=False
[Philidor: Philidor counter-gambit, Berger variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 d4e5 f5e4 f3g5 d6d5 e5e6 f8c5 b1c3
PGN=1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6 Bc5 7. Nc3
BASIC=False
[Philidor: Philidor counter-gambit, Zukertort variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 b1c3
PGN=1. e4 e5 2. Nf3 d6 3. d4 f5 4. Nc3
BASIC=False
[Philidor: Philidor counter-gambit, del Rio attack]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 d4e5 f5e4 f3g5 d6d5 e5e6
PGN=1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6
BASIC=False
[Philidor: Steinitz variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 f1c4 f8e7 c2c3
PGN=1. e4 e5 2. Nf3 d6 3. Bc4 Be7 4. c3
BASIC=False
[Philidor: exchange variation]
ECO=C41
A1H8=e2e4 e7e5 g1f3 d7d6 d2d4 e5d4
PGN=1. e4 e5 2. Nf3 d6 3. d4 exd4
BASIC=False
[Pirc defence]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3
PGN=1. e4 d6 2. d4 Nf6 3. Nc3
BASIC=True
[Pirc: 150 attack]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1e3 c7c6 d1d2
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2
BASIC=False
[Pirc: Austrian attack]
ECO=B09
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4
BASIC=False
[Pirc: Austrian attack, 6.Bd3]
ECO=B09
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 f1d3
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3
BASIC=False
[Pirc: Austrian attack, 6.Be3]
ECO=B09
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 c1e3
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Be3
BASIC=False
[Pirc: Austrian attack, 6.e5]
ECO=B09
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 e4e5
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. e5
BASIC=False
[Pirc: Austrian attack, Ljubojevic variation]
ECO=B09
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 f1c4
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Bc4
BASIC=False
[Pirc: Austrian attack, dragon formation]
ECO=B09
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 c7c5
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5
BASIC=False
[Pirc: Byrne variation]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1g5
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5
BASIC=False
[Pirc: Chinese variation]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1e2 f8g7 g2g4
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. g4
BASIC=False
[Pirc: Holmov system]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1c4
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4
BASIC=False
[Pirc: Sveshnikov system]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g2g3
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. g3
BASIC=False
[Pirc: Ufimtsev-Pytel variation]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 c7c6
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 c6
BASIC=False
[Pirc: bayonet (Mariotti) attack]
ECO=B07
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1e2 f8g7 h2h4
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. h4
BASIC=False
[Pirc: classical (two knights) system]
ECO=B08
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3
BASIC=False
[Pirc: classical system, 5.Be2]
ECO=B08
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2
BASIC=False
[Pirc: classical, h3 system]
ECO=B08
A1H8=e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 h2h3
PGN=1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. h3
BASIC=False
[Polish (Sokolsky) opening]
ECO=A00
A1H8=b2b4
PGN=1. b4
BASIC=False
[Polish defence]
ECO=A40
A1H8=d2d4 b7b5
PGN=1. d4 b5
BASIC=False
[Polish: Outflank variation]
ECO=A00
A1H8=b2b4 c7c6
PGN=1. b4 c6
BASIC=False
[Polish: Tuebingen variation]
ECO=A00
A1H8=b2b4 g8h6
PGN=1. b4 Nh6
BASIC=False
[Ponziani counter-gambit]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 f7f5
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 f5
BASIC=False
[Ponziani counter-gambit, Cordel variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 f7f5 d2d4 d7d6 d4d5 f5e4 f3g5 c6b8 g5e4 g8f6 f1d3 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 f5 4. d4 d6 5. d5 fxe4 6. Ng5 Nb8 7. Nxe4 Nf6 8. Bd3 Be7
BASIC=False
[Ponziani counter-gambit, Schmidt attack]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 f7f5 d2d4 d7d6 d4d5
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 f5 4. d4 d6 5. d5
BASIC=False
[Ponziani opening]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3
PGN=1. e4 e5 2. Nf3 Nc6 3. c3
BASIC=False
[Ponziani: Caro variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 c8d7
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Bd7
BASIC=False
[Ponziani: Fraser defence]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d4 f6e4 d4d5 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Bc5
BASIC=False
[Ponziani: Jaenisch counter-attack]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 Nf6
BASIC=False
[Ponziani: Leonhardt variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Nf6
BASIC=False
[Ponziani: Reti variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 g8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 Nge7
BASIC=False
[Ponziani: Romanishin variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 Be7
BASIC=False
[Ponziani: Steinitz variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 f7f6
PGN=1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 f6
BASIC=False
[Pterodactyl defence]
ECO=A42
A1H8=d2d4 d7d6 c2c4 g7g6 b1c3 f8g7 e2e4 c7c5 g1f3 d8a5
PGN=1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 c5 5. Nf3 Qa5
BASIC=False
[QGA, 4.Nc3]
ECO=D24
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3
BASIC=False
[QGA, 4.e3]
ECO=D25
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3
BASIC=False
[QGA, Bogolyubov variation]
ECO=D24
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3 a7a6 e2e4
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4
BASIC=False
[QGA, Flohr variation]
ECO=D25
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 c8e6
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Be6
BASIC=False
[QGA, Janowsky-Larsen variation]
ECO=D25
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 c8g4
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4
BASIC=False
[QGA, Smyslov variation]
ECO=D25
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 g7g6
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6
BASIC=False
[QGA: 3.Nf3]
ECO=D21
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3
PGN=1. d4 d5 2. c4 dxc4 3. Nf3
BASIC=False
[QGA: 3.e4]
ECO=D20
A1H8=d2d4 d7d5 c2c4 d5c4 e2e4
PGN=1. d4 d5 2. c4 dxc4 3. e4
BASIC=False
[QGA: 4...e6]
ECO=D26
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6
BASIC=False
[QGA: Alekhine defence]
ECO=D22
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 a7a6
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 a6
BASIC=False
[QGA: Alekhine defence, Alatortsev variation]
ECO=D22
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e3 c8g4 f1c4 e7e6 d4d5
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 Bg4 5. Bxc4 e6 6. d5
BASIC=False
[QGA: Alekhine defense, Borisenko-Furman variation]
ECO=D22
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e4
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e4
BASIC=False
[QGA: Ericson variation]
ECO=D21
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 b7b5
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 b5
BASIC=False
[QGA: Haberditz variation]
ECO=D22
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e3 b7b5
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 b5
BASIC=False
[QGA: Linares variation]
ECO=D20
A1H8=d2d4 d7d5 c2c4 d5c4 e2e4 c7c5 d4d5 g8f6 b1c3 b7b5
PGN=1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 Nf6 5. Nc3 b5
BASIC=False
[QGA: Mannheim variation]
ECO=D23
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 d1a4
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+
BASIC=False
[QGA: Schwartz defence]
ECO=D20
A1H8=d2d4 d7d5 c2c4 d5c4 e2e4 f7f5
PGN=1. d4 d5 2. c4 dxc4 3. e4 f5
BASIC=False
[QGA: classical variation]
ECO=D26
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5
BASIC=False
[QGA: classical variation, 6.O-O]
ECO=D26
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O
BASIC=False
[QGA: classical, 6...a6]
ECO=D27
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6
BASIC=False
[QGA: classical, 7...b5]
ECO=D28
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5
BASIC=False
[QGA: classical, 7.Qe2]
ECO=D28
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2
BASIC=False
[QGA: classical, 8...Bb7]
ECO=D29
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 c8b7
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7
BASIC=False
[QGA: classical, Flohr variation]
ECO=D28
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 b8c6 f1d1 c5c4 b3c2 c6b4 b1c3 b4c2 e2c2 c8b7 d4d5 d8c7
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7
BASIC=False
[QGA: classical, Furman variation]
ECO=D26
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 d1e2 a7a6 d4c5 f8c5 e1g1 b8c6 e3e4 b7b5 e4e5
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. Qe2 a6 7. dxc5 Bxc5 8. O-O Nc6 9. e4 b5 10. e5
BASIC=False
[QGA: classical, Geller variation]
ECO=D27
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 e3e4
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. e4
BASIC=False
[QGA: classical, Rubinstein variation]
ECO=D27
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 a2a4
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4
BASIC=False
[QGA: classical, Smyslov variation]
ECO=D29
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 c8b7 f1d1 b8d7 b1c3 f8d6
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. Rd1 Nbd7 10. Nc3 Bd6
BASIC=False
[QGA: classical, Steinitz variation]
ECO=D26
A1H8=d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 c5d4
PGN=1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O cxd4
BASIC=False
[QGD]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 c1g5
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5
BASIC=False
[QGD Slav]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 e2e3 c7c6 b1d2
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2
BASIC=False
[QGD Slav accepted]
ECO=D15
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4
BASIC=False
[QGD Slav accepted: Alapin variation]
ECO=D16
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4
BASIC=False
[QGD Slav defence]
ECO=D10
A1H8=d2d4 d7d5 c2c4 c7c6
PGN=1. d4 d5 2. c4 c6
BASIC=True
[QGD Slav defence, Alekhine variation]
ECO=D10
A1H8=d2d4 d7d5 c2c4 c7c6 b1c3 d5c4 e2e4
PGN=1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. e4
BASIC=False
[QGD Slav defence: exchange variation]
ECO=D10
A1H8=d2d4 d7d5 c2c4 c7c6 c4d5
PGN=1. d4 d5 2. c4 c6 3. cxd5
BASIC=False
[QGD Slav: 3.Nf3]
ECO=D11
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3
PGN=1. d4 d5 2. c4 c6 3. Nf3
BASIC=False
[QGD Slav: 4.Nc3]
ECO=D15
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3
BASIC=False
[QGD Slav: 4.e3]
ECO=D11
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3
BASIC=False
[QGD Slav: 4.e3 Bf5]
ECO=D12
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5
BASIC=False
[QGD Slav: 5.e3 (Alekhine variation)]
ECO=D15
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e3
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e3
BASIC=False
[QGD Slav: Amsterdam variation]
ECO=D12
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 b1c3 e7e6 f3e5 f6d7
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 e6 7. Ne5 Nfd7
BASIC=False
[QGD Slav: Breyer variation]
ECO=D11
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1d2
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2
BASIC=False
[QGD Slav: Carlsbad variation]
ECO=D17
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 b8d7 e5c4 d8c7 g2g3 e7e5
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5
BASIC=False
[QGD Slav: Czech defence]
ECO=D17
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5
BASIC=False
[QGD Slav: Dutch variation]
ECO=D18
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3
BASIC=False
[QGD Slav: Dutch variation, main line]
ECO=D19
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1 e8g8 d1e2
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2
BASIC=False
[QGD Slav: Dutch, Lasker variation]
ECO=D18
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 b8a6
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 Na6
BASIC=False
[QGD Slav: Dutch, Saemisch variation]
ECO=D19
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1 e8g8 d1e2 f6e4 g2g4
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2 Ne4 10. g4
BASIC=False
[QGD Slav: Krause attack]
ECO=D17
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5
BASIC=False
[QGD Slav: Landau variation]
ECO=D12
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 d1b3 d8c8 c1d2 e7e6 b1a3
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc8 7. Bd2 e6 8. Na3
BASIC=False
[QGD Slav: Schlechter variation]
ECO=D15
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 g7g6
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 g6
BASIC=False
[QGD Slav: Semmering variation]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 e2e3 c7c6 b1d2 b8d7 f1d3 c6c5
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 Nbd7 6. Bd3 c5
BASIC=False
[QGD Slav: Slav gambit]
ECO=D15
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e4
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4
BASIC=False
[QGD Slav: Smyslov variation]
ECO=D16
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 b8a6 e2e4 c8g4
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Na6 6. e4 Bg4
BASIC=False
[QGD Slav: Soultanbeieff variation]
ECO=D16
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 e7e6
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6
BASIC=False
[QGD Slav: Steiner variation]
ECO=D16
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8g4
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bg4
BASIC=False
[QGD Slav: Suechting variation]
ECO=D15
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d8b6
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 Qb6
BASIC=False
[QGD Slav: Tolush-Geller gambit]
ECO=D15
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e4 b7b5 e4e5
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 b5 6. e5
BASIC=False
[QGD Slav: Wiesbaden variation]
ECO=D17
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 e7e6
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6
BASIC=False
[QGD Slav: Winawer counter-gambit]
ECO=D10
A1H8=d2d4 d7d5 c2c4 c7c6 b1c3 e7e5
PGN=1. d4 d5 2. c4 c6 3. Nc3 e5
BASIC=False
[QGD Slav: exchange variation]
ECO=D12
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 b1c3
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3
BASIC=False
[QGD Slav: exchange variation, 6.Bf4 Bf5]
ECO=D14
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c4d5 c6d5 b1c3 b8c6 c1f4 c8f5
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5
BASIC=False
[QGD Slav: exchange, Trifunovic variation]
ECO=D14
A1H8=d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c4d5 c6d5 b1c3 b8c6 c1f4 c8f5 e2e3 e7e6 d1b3 f8b4
PGN=1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Qb3 Bb4
BASIC=False
[QGD semi-Slav]
ECO=D43
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6
BASIC=False
[QGD semi-Slav: 5...Nd7]
ECO=D45
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7
BASIC=False
[QGD semi-Slav: 5.Bg5 dc]
ECO=D44
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 d5c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4
BASIC=False
[QGD semi-Slav: 5.e3]
ECO=D45
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3
BASIC=False
[QGD semi-Slav: 6.Bd3]
ECO=D46
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3
BASIC=False
[QGD semi-Slav: 7.Bc4]
ECO=D47
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4
BASIC=False
[QGD semi-Slav: Bogolyubov variation]
ECO=D46
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 f8e7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 Be7
BASIC=False
[QGD semi-Slav: Botvinnik system (anti-Meran)]
ECO=D44
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 d5c4 e2e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4
BASIC=False
[QGD semi-Slav: Chigorin defence]
ECO=D46
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 f8d6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 Bd6
BASIC=False
[QGD semi-Slav: Ekstrom variation]
ECO=D44
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 e5f6 g5h4 f3e5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. exf6 gxh4 10. Ne5
BASIC=False
[QGD semi-Slav: Hastings variation]
ECO=D43
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 h7h6 g5f6 d8f6 d1b3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. Qb3
BASIC=False
[QGD semi-Slav: Meran]
ECO=D48
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5
BASIC=False
[QGD semi-Slav: Meran variation]
ECO=D47
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5
BASIC=False
[QGD semi-Slav: Meran, 8...a6]
ECO=D48
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6
BASIC=False
[QGD semi-Slav: Meran, Blumenfeld variation]
ECO=D49
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5
BASIC=False
[QGD semi-Slav: Meran, Pirc variation]
ECO=D48
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 b5b4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 b4
BASIC=False
[QGD semi-Slav: Meran, Rabinovich variation]
ECO=D49
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 f6g4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Ng4
BASIC=False
[QGD semi-Slav: Meran, Rellstab attack]
ECO=D49
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 e1g1 d8d5 d1e2 c8a6 c1g5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O Qd5 14. Qe2 Ba6 15. Bg5
BASIC=False
[QGD semi-Slav: Meran, Reynolds' variation]
ECO=D48
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 d4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. d5
BASIC=False
[QGD semi-Slav: Meran, Sozin variation]
ECO=D49
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5
BASIC=False
[QGD semi-Slav: Meran, Stahlberg variation]
ECO=D49
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 d1f3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. Qf3
BASIC=False
[QGD semi-Slav: Meran, Wade variation]
ECO=D47
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 c8b7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7
BASIC=False
[QGD semi-Slav: Meran, old main line]
ECO=D48
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5
BASIC=False
[QGD semi-Slav: Romih variation]
ECO=D46
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 f8b4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 Bb4
BASIC=False
[QGD semi-Slav: Rubinstein (anti-Meran) system]
ECO=D45
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f3e5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Ne5
BASIC=False
[QGD semi-Slav: Stoltz variation]
ECO=D45
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 d1c2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Qc2
BASIC=False
[QGD semi-Slav: accelerated Meran (Alekhine variation)]
ECO=D45
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 a7a6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 a6
BASIC=False
[QGD semi-Slav: anti-Meran gambit]
ECO=D44
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5
BASIC=False
[QGD semi-Slav: anti-Meran, Alatortsev system]
ECO=D44
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 f6d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 Nd5
BASIC=False
[QGD semi-Slav: anti-Meran, Lilienthal variation]
ECO=D44
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 h6g5 h4g5 b8d7 g2g3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. g3
BASIC=False
[QGD semi-Slav: anti-Meran, Szabo variation]
ECO=D44
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 h6g5 h4g5 b8d7 d1f3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. Qf3
BASIC=False
[QGD semi-Slav: neo-Meran (Lundin variation)]
ECO=D47
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 b5b4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4
BASIC=False
[QGD semi-Slav: stonewall defence]
ECO=D45
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c6 e2e3 f6e4 f1d3 f7f5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Ne4 6. Bd3 f5
BASIC=False
[QGD: 3...Nf6]
ECO=D35
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6
BASIC=False
[QGD: 3.Nc3]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3
PGN=1. d4 d5 2. c4 e6 3. Nc3
BASIC=False
[QGD: 4.Bg5]
ECO=D50
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5
BASIC=False
[QGD: 4.Bg5 Be7]
ECO=D53
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7
BASIC=False
[QGD: 4.Bg5 Be7, 5.e3 O-O]
ECO=D53
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O
BASIC=False
[QGD: 4.Bg5 Nbd7]
ECO=D51
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7
BASIC=False
[QGD: 4.Nf3]
ECO=D37
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3
BASIC=False
[QGD: 5...c6]
ECO=D51
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6
BASIC=False
[QGD: 6.Nf3]
ECO=D55
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3
BASIC=False
[QGD: Alapin variation]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 b7b6
PGN=1. d4 d5 2. c4 e6 3. Nc3 b6
BASIC=False
[QGD: Albin counter-gambit]
ECO=D08
A1H8=d2d4 d7d5 c2c4 e7e5
PGN=1. d4 d5 2. c4 e5
BASIC=False
[QGD: Albin counter-gambit, 5.g3]
ECO=D09
A1H8=d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3
PGN=1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3
BASIC=False
[QGD: Albin counter-gambit, Alapin variation]
ECO=D08
A1H8=d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2
PGN=1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2
BASIC=False
[QGD: Albin counter-gambit, Balogh variation]
ECO=D08
A1H8=d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 d8e7
PGN=1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Qe7
BASIC=False
[QGD: Albin counter-gambit, Janowski variation]
ECO=D08
A1H8=d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 f7f6
PGN=1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 f6
BASIC=False
[QGD: Albin counter-gambit, Krenosz variation]
ECO=D08
A1H8=d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 c8g4 h2h3 g4f3 d2f3 f8b4 c1d2 d8e7
PGN=1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Bg4 6. h3 Bxf3 7. Nxf3 Bb4+ 8. Bd2 Qe7
BASIC=False
[QGD: Albin counter-gambit, Lasker trap]
ECO=D08
A1H8=d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 e2e3 f8b4 c1d2 d4e3
PGN=1. d4 d5 2. c4 e5 3. dxe5 d4 4. e3 Bb4+ 5. Bd2 dxe3
BASIC=False
[QGD: Alekhine variation]
ECO=D51
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 g1f3 c7c6 e2e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e4
BASIC=False
[QGD: Anti-neo-orthodox variation]
ECO=D54
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 a1c1
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Rc1
BASIC=False
[QGD: Been-Koomen variation]
ECO=D50
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5
BASIC=False
[QGD: Cambridge Springs defence]
ECO=D52
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5
BASIC=False
[QGD: Cambridge Springs defence, 7.cd]
ECO=D52
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 c4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. cxd5
BASIC=False
[QGD: Cambridge Springs defence, Argentine variation]
ECO=D52
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 f3d2 f8b4 d1c2 e8g8 g5h4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8. Qc2 O-O 9. Bh4
BASIC=False
[QGD: Cambridge Springs defence, Bogoljubow variation]
ECO=D52
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 f3d2 f8b4 d1c2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8. Qc2
BASIC=False
[QGD: Cambridge Springs defence, Capablanca variation]
ECO=D52
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 g5f6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Bxf6
BASIC=False
[QGD: Cambridge Springs defence, Rubinstein variation]
ECO=D52
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 f3d2 d5c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 dxc4
BASIC=False
[QGD: Cambridge Springs defence, Yugoslav variation]
ECO=D52
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 c4d5 f6d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. cxd5 Nxd5
BASIC=False
[QGD: Canal (Venice) variation]
ECO=D50
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 c4d5 d8b6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 Qb6
BASIC=False
[QGD: Capablanca anti-Cambridge Springs variation]
ECO=D51
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 a2a3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. a3
BASIC=False
[QGD: Capablanca variation]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 c1g5 b8d7 e2e3 c7c6 b1d2
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nbd2
BASIC=False
[QGD: Capablanca-Duras variation]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 c1g5 h7h6
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 h6
BASIC=False
[QGD: Charousek (Petrosian) variation]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 f8e7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Be7
BASIC=False
[QGD: Chigorin defence]
ECO=D07
A1H8=d2d4 d7d5 c2c4 b8c6
PGN=1. d4 d5 2. c4 Nc6
BASIC=False
[QGD: Chigorin defence, Janowski variation]
ECO=D07
A1H8=d2d4 d7d5 c2c4 b8c6 b1c3 d5c4 g1f3
PGN=1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3
BASIC=False
[QGD: Grau (Sahovic) defence]
ECO=D06
A1H8=d2d4 d7d5 c2c4 c8f5
PGN=1. d4 d5 2. c4 Bf5
BASIC=False
[QGD: Harrwitz attack]
ECO=D35
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1f4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4
BASIC=False
[QGD: Hastings variation]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 c1g5 h7h6 g5f6 d8f6 b1c3 c7c6 d1b3
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 h6 5. Bxf6 Qxf6 6. Nc3 c6 7. Qb3
BASIC=False
[QGD: Janowski variation]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 a7a6
PGN=1. d4 d5 2. c4 e6 3. Nc3 a6
BASIC=False
[QGD: Lasker defence]
ECO=D56
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4
BASIC=False
[QGD: Lasker defence, Bernstein variation]
ECO=D57
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3 e6d5 d1b3 e7d6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Qd6
BASIC=False
[QGD: Lasker defence, Russian variation]
ECO=D56
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 d1c2 e4f6 f1d3 d5c4 d3c4 c7c5 e1g1 b8c6 f1d1 c8d7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. Qc2 Nf6 10. Bd3 dxc4 11. Bxc4 c5 12. O-O Nc6 13. Rfd1 Bd7
BASIC=False
[QGD: Lasker defence, Teichmann variation]
ECO=D56
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 d1c2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. Qc2
BASIC=False
[QGD: Lasker defence, main line]
ECO=D57
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3
BASIC=False
[QGD: Lasker variation]
ECO=D53
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 f6e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Ne4
BASIC=False
[QGD: Manhattan variation]
ECO=D51
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 f8b4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Bb4
BASIC=False
[QGD: Marshall defence]
ECO=D06
A1H8=d2d4 d7d5 c2c4 g8f6
PGN=1. d4 d5 2. c4 Nf6
BASIC=False
[QGD: Neo-orthodox variation]
ECO=D55
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6
BASIC=False
[QGD: Neo-orthodox variation, 7.Bh4]
ECO=D55
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4
BASIC=False
[QGD: Neo-orthodox variation, 7.Bxf6]
ECO=D55
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5f6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bxf6
BASIC=False
[QGD: Orthodox defence]
ECO=D60
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7
BASIC=False
[QGD: Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)]
ECO=D62
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2 c7c5 c4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 c5 8. cxd5
BASIC=False
[QGD: Orthodox defence, 7.Rc1]
ECO=D63
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1
BASIC=False
[QGD: Orthodox defence, Bd3 line]
ECO=D66
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3
BASIC=False
[QGD: Orthodox defence, Bd3 line, 11.O-O]
ECO=D67
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O
BASIC=False
[QGD: Orthodox defence, Bd3 line, Alekhine variation]
ECO=D67
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 c3e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. Ne4
BASIC=False
[QGD: Orthodox defence, Bd3 line, Capablanca freeing manoevre]
ECO=D67
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5
BASIC=False
[QGD: Orthodox defence, Bd3 line, Janowski variation]
ECO=D67
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 h2h4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. h4
BASIC=False
[QGD: Orthodox defence, Bd3 line, fianchetto variation]
ECO=D66
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 b7b5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 b5
BASIC=False
[QGD: Orthodox defence, Botvinnik variation]
ECO=D60
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 f1d3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Bd3
BASIC=False
[QGD: Orthodox defence, Capablanca variation]
ECO=D63
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 b7b6 c4d5 e6d5 f1b5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bb5
BASIC=False
[QGD: Orthodox defence, Pillsbury attack]
ECO=D63
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 b7b6 c4d5 e6d5 f1d3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bd3
BASIC=False
[QGD: Orthodox defence, Rauzer variation]
ECO=D60
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1b3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qb3
BASIC=False
[QGD: Orthodox defence, Rubinstein attack (with Rc1)]
ECO=D64
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 d1c2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2
BASIC=False
[QGD: Orthodox defence, Rubinstein attack, Gruenfeld variation]
ECO=D64
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 d1c2 a7a6 a2a3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. a3
BASIC=False
[QGD: Orthodox defence, Rubinstein attack, Karlsbad variation]
ECO=D64
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 d1c2 a7a6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2 a6
BASIC=False
[QGD: Orthodox defence, Rubinstein attack, Wolf variation]
ECO=D64
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 d1c2 f6e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2 Ne4
BASIC=False
[QGD: Orthodox defence, Rubinstein attack, main line]
ECO=D65
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 d1c2 a7a6 c4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. cxd5
BASIC=False
[QGD: Orthodox defence, Rubinstein variation]
ECO=D61
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2
BASIC=False
[QGD: Orthodox defence, Swiss (Henneberger) variation]
ECO=D63
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 a7a6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 a6
BASIC=False
[QGD: Orthodox defence, Swiss, Karlsbad variation]
ECO=D63
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 a7a6 c4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 a6 8. cxd5
BASIC=False
[QGD: Orthodox defence, classical variation]
ECO=D68
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5
BASIC=False
[QGD: Orthodox defence, classical, 13.d1b1 (Maroczy)]
ECO=D68
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d1b1
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qb1
BASIC=False
[QGD: Orthodox defence, classical, 13.d1c2 (Vidmar)]
ECO=D68
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d1c2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qc2
BASIC=False
[QGD: Orthodox defence, classical, 13.de]
ECO=D69
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d4e5 d7e5 f3e5 e7e5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5
BASIC=False
[QGD: Petrosian variation]
ECO=D55
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5f6 e7f6 a1c1 c7c6 f1d3 b8d7 e1g1 d5c4 d3c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bxf6 Bxf6 8. Rc1 c6 9. Bd3 Nd7 10. O-O dxc4 11. Bxc4
BASIC=False
[QGD: Pillsbury attack]
ECO=D55
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b7b6 f1d3 c8b7 c4d5 e6d5 f3e5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 b6 7. Bd3 Bb7 8. cxd5 exd5 9. Ne5
BASIC=False
[QGD: Ragozin variation]
ECO=D38
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 f8b4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4
BASIC=False
[QGD: Ragozin, Vienna variation]
ECO=D39
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 f8b4 c1g5 d5c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4 5. Bg5 dxc4
BASIC=False
[QGD: Rochlin variation]
ECO=D51
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 g1f3 c7c6 a1c1 d8a5 g5d2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. Rc1 Qa5 7. Bd2
BASIC=False
[QGD: Semi-Tarrasch]
ECO=D50
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 c4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5
BASIC=False
[QGD: Semi-Tarrasch defence]
ECO=D40
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5
BASIC=False
[QGD: Semi-Tarrasch defence, Pillsbury variation]
ECO=D40
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c1g5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5
BASIC=False
[QGD: Semi-Tarrasch with e3]
ECO=D41
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c4d5 f6d5 e2e3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3
BASIC=False
[QGD: Semi-Tarrasch, 5.cd]
ECO=D41
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5
BASIC=False
[QGD: Semi-Tarrasch, 7.Bd3]
ECO=D42
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c4d5 f6d5 e2e3 b8c6 f1d3
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3
BASIC=False
[QGD: Semi-Tarrasch, Kmoch variation]
ECO=D41
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c4d5 f6d5 e2e4 d5c3 b2c3 c5d4 c3d4 f8b4 c1d2 b4d2 d1d2 e8g8 f1b5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bb5
BASIC=False
[QGD: Semi-Tarrasch, Krause variation]
ECO=D50
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 g1f3 c5d4 f3d4 e6e5 d4b5 a7a6 d1a4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8. Qa4
BASIC=False
[QGD: Semi-Tarrasch, Levenfish variation]
ECO=D40
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 e2e3 b8c6 f1d3 f8d6 e1g1 e8g8 d1e2 d8e7 d4c5 d6c5 e3e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. Qe2 Qe7 9. dxc5 Bxc5 10. e4
BASIC=False
[QGD: Semi-Tarrasch, Primitive Pillsbury variation]
ECO=D50
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 g1f3 c5d4 d1d4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4
BASIC=False
[QGD: Semi-Tarrasch, San Sebastian variation]
ECO=D41
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c4d5 f6d5 e2e4 d5c3 b2c3 c5d4 c3d4 f8b4 c1d2 d8a5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Qa5
BASIC=False
[QGD: Semi-Tarrasch, symmetrical variation]
ECO=D40
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 e2e3 b8c6 f1d3 f8d6 e1g1 e8g8
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O
BASIC=False
[QGD: Spielmann variation]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 e2e3 c7c6 b1d2 g7g6
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 g6
BASIC=False
[QGD: Stonewall variation]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 e2e3 c7c6 b1d2 f6e4 f1d3 f7f5
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 Ne4 6. Bd3 f5
BASIC=False
[QGD: Tarrasch defence]
ECO=D32
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5
BASIC=False
[QGD: Tarrasch defence, 4.cd ed]
ECO=D32
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5
BASIC=False
[QGD: Tarrasch defence, Marshall gambit]
ECO=D32
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 e2e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. e4
BASIC=False
[QGD: Tarrasch defence, Tarrasch gambit]
ECO=D32
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 d4c5 d5d4 c3a4 b7b5
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. dxc5 d4 6. Na4 b5
BASIC=False
[QGD: Tarrasch, Bogolyubov variation]
ECO=D34
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c8e6 a1c1 c5c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6 10. Rc1 c4
BASIC=False
[QGD: Tarrasch, Folkestone (Swedish) variation]
ECO=D33
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 c5c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4
BASIC=False
[QGD: Tarrasch, Prague variation]
ECO=D33
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6
BASIC=False
[QGD: Tarrasch, Prague variation, 7...Be7]
ECO=D34
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7
BASIC=False
[QGD: Tarrasch, Prague variation, 9.Bg5]
ECO=D34
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5
BASIC=False
[QGD: Tarrasch, Prague variation, Normal position]
ECO=D34
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O
BASIC=False
[QGD: Tarrasch, Reti variation]
ECO=D34
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 d4c5 e7c5 c3a4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 Bxc5 10. Na4
BASIC=False
[QGD: Tarrasch, Schlechter-Rubinstein system]
ECO=D33
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3
BASIC=False
[QGD: Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation]
ECO=D33
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 c5c4 e2e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 7. e4
BASIC=False
[QGD: Tarrasch, Stoltz variation]
ECO=D34
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c8e6 a1c1 b7b6
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6 10. Rc1 b6
BASIC=False
[QGD: Tarrasch, Wagner variation]
ECO=D33
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 c8g4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Bg4
BASIC=False
[QGD: Tarrasch, von Hennig-Schara gambit]
ECO=D32
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 c5d4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4
BASIC=False
[QGD: Tartakower (Makagonov-Bondarevsky) system]
ECO=D58
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 b7b6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6
BASIC=False
[QGD: Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5]
ECO=D59
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 b7b6 c4d5 f6d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 8. cxd5 Nxd5
BASIC=False
[QGD: Tartakower variation]
ECO=D59
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 b7b6 c4d5 f6d5 h4e7 d8e7 c3d5 e6d5 a1c1 c8e6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6
BASIC=False
[QGD: Vienna variation]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 c1g5 f8b4
PGN=1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 Bb4+
BASIC=False
[QGD: classical variation (5.Bf4)]
ECO=D37
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 f8e7 c1f4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4
BASIC=False
[QGD: exchange variation]
ECO=D35
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5
BASIC=False
[QGD: exchange, Saemisch variation]
ECO=D35
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5 e6d5 g1f3 b8d7 c1f4
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Nf3 Nbd7 6. Bf4
BASIC=False
[QGD: exchange, chameleon variation]
ECO=D35
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5 e6d5 c1g5 f8e7 e2e3 e8g8 f1d3 b8d7 d1c2 f8e8 g1e2 d7f8 e1c1
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7 8. Qc2 Re8 9. Nge2 Nf8 10. O-O-O
BASIC=False
[QGD: exchange, positional line]
ECO=D35
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5 e6d5 c1g5
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5
BASIC=False
[QGD: exchange, positional line, 5...c6]
ECO=D35
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5 e6d5 c1g5 c7c6
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6
BASIC=False
[QGD: exchange, positional line, 6.Qc2]
ECO=D36
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5 e6d5 c1g5 c7c6 d1c2
PGN=1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. Qc2
BASIC=False
[QGD: semi-Slav]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c6
PGN=1. d4 d5 2. c4 e6 3. Nc3 c6
BASIC=False
[QGD: semi-Slav, Abrahams variation]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 a2a4 f8b4 e2e3 b7b5 c1d2 a7a5
PGN=1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5
BASIC=False
[QGD: semi-Slav, Junge variation]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 a2a4 f8b4 e2e3 b7b5 c1d2 d8b6
PGN=1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qb6
BASIC=False
[QGD: semi-Slav, Koomen variation]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 a2a4 f8b4 e2e3 b7b5 c1d2 d8e7
PGN=1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qe7
BASIC=False
[QGD: semi-Slav, Marshall gambit]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4
BASIC=False
[QGD: semi-Slav, Noteboom variation]
ECO=D31
A1H8=d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4
PGN=1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4
BASIC=False
[QGD: symmetrical (Austrian) defence]
ECO=D06
A1H8=d2d4 d7d5 c2c4 c7c5
PGN=1. d4 d5 2. c4 c5
BASIC=False
[QP counter-gambit (elephant gambit)]
ECO=C40
A1H8=e2e4 e7e5 g1f3 d7d5
PGN=1. e4 e5 2. Nf3 d5
BASIC=False
[QP counter-gambit: Maroczy gambit]
ECO=C40
A1H8=e2e4 e7e5 g1f3 d7d5 e4d5 f8d6
PGN=1. e4 e5 2. Nf3 d5 3. exd5 Bd6
BASIC=False
[Queen's Gambit]
ECO=D06
A1H8=d2d4 d7d5 c2c4
PGN=1. d4 d5 2. c4
BASIC=True
[Queen's Indian defence]
ECO=E12
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6
BASIC=True
[Queen's Indian accelerated]
ECO=A50
A1H8=d2d4 g8f6 c2c4 b7b6
PGN=1. d4 Nf6 2. c4 b6
BASIC=False
[Queen's Indian: 4.Nc3]
ECO=E12
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3
BASIC=False
[Queen's Indian: 4.Nc3, Botvinnik variation]
ECO=E12
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 c8b7 c1g5 h7h6 g5h4 g7g5 h4g3 f6h5
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 g5 7. Bg3 Nh5
BASIC=False
[Queen's Indian: 4.Nc3, main line]
ECO=E13
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 c8b7 c1g5 h7h6 g5h4 f8b4
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 Bb4
BASIC=False
[Queen's Indian: 4.e3]
ECO=E14
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3
BASIC=False
[Queen's Indian: 4.g3]
ECO=E15
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3
BASIC=False
[Queen's Indian: 4.g3 Bb7]
ECO=E15
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7
BASIC=False
[Queen's Indian: 5.Bg2 Be7]
ECO=E17
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7
BASIC=False
[Queen's Indian: Averbakh variation]
ECO=E14
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3 c8b7 f1d3 c7c5 e1g1 f8e7 b2b3 e8g8 c1b2 c5d4 f3d4
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. b3 O-O 8. Bb2 cxd4 9. Nxd4
BASIC=False
[Queen's Indian: Buerger variation]
ECO=E15
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 d4d5 e6d5 f3g5
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Ng5
BASIC=False
[Queen's Indian: Capablanca variation]
ECO=E16
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+
BASIC=False
[Queen's Indian: Euwe variation]
ECO=E17
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b2b3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. b3
BASIC=False
[Queen's Indian: Marienbad system]
ECO=A47
A1H8=d2d4 g8f6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5
PGN=1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5
BASIC=False
[Queen's Indian: Marienbad system, Berg variation]
ECO=A47
A1H8=d2d4 g8f6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 c2c4 c5d4 d1d4
PGN=1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4
BASIC=False
[Queen's Indian: Miles variation]
ECO=E12
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 c1f4
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4
BASIC=False
[Queen's Indian: Nimzovich variation (exaggerated fianchetto)]
ECO=E15
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6
BASIC=False
[Queen's Indian: Opovcensky variation]
ECO=E17
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 b1c3 f6e4 c1d2
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Bd2
BASIC=False
[Queen's Indian: Petrosian system]
ECO=E12
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3
BASIC=False
[Queen's Indian: Riumin variation]
ECO=E16
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 b4e7
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7
BASIC=False
[Queen's Indian: Rubinstein variation]
ECO=E15
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 d4d5 e6d5 f3h4
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Nh4
BASIC=False
[Queen's Indian: Yates variation]
ECO=E16
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 a7a5
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 a5
BASIC=False
[Queen's Indian: anti-Queen's Indian system]
ECO=E17
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 b1c3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3
BASIC=False
[Queen's Indian: old main line, 6.O-O]
ECO=E17
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O
BASIC=False
[Queen's Indian: old main line, 7.Nc3]
ECO=E18
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3
BASIC=False
[Queen's Indian: old main line, 9.Qxc3]
ECO=E19
A1H8=d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3 f6e4 d1c2 e4c3 c2c3
PGN=1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3
BASIC=False
[Queen's Pawn]
ECO=A41
A1H8=d2d4 d7d6
PGN=1. d4 d6
BASIC=False
[Queen's bishop game]
ECO=D02
A1H8=d2d4 d7d5 g1f3 g8f6 c1f4
PGN=1. d4 d5 2. Nf3 Nf6 3. Bf4
BASIC=False
[Queen's gambit accepted]
ECO=D20
A1H8=d2d4 d7d5 c2c4 d5c4
PGN=1. d4 d5 2. c4 dxc4
BASIC=True
[Queen's gambit declined]
ECO=D30
A1H8=d2d4 d7d5 c2c4 e7e6
PGN=1. d4 d5 2. c4 e6
BASIC=True
[Queen's pawn]
ECO=A40
A1H8=d2d4
PGN=1. d4
BASIC=True
[Queen's pawn game]
ECO=A45
A1H8=d2d4 g8f6
PGN=1. d4 Nf6
BASIC=True
[Queen's pawn game, Chigorin variation]
ECO=D02
A1H8=d2d4 d7d5 g1f3 b8c6
PGN=1. d4 d5 2. Nf3 Nc6
BASIC=False
[Queen's pawn game, Krause variation]
ECO=D02
A1H8=d2d4 d7d5 g1f3 c7c5
PGN=1. d4 d5 2. Nf3 c5
BASIC=False
[Queen's pawn game, Rubinstein (Colle-Zukertort) variation]
ECO=D05
A1H8=d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 f1d3 c7c5 b2b3
PGN=1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. b3
BASIC=False
[Queen's pawn game, Zukertort variation]
ECO=D05
A1H8=d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 b1d2 c7c5 b2b3
PGN=1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Nbd2 c5 5. b3
BASIC=False
[Queen's pawn, Mason variation]
ECO=D00
A1H8=d2d4 d7d5 c1f4
PGN=1. d4 d5 2. Bf4
BASIC=False
[Queen's pawn, Mason variation, Steinitz counter-gambit]
ECO=D00
A1H8=d2d4 d7d5 c1f4 c7c5
PGN=1. d4 d5 2. Bf4 c5
BASIC=False
[Queen's pawn: Anti-Veresov]
ECO=D00
A1H8=d2d4 d7d5 b1c3 c8g4
PGN=1. d4 d5 2. Nc3 Bg4
BASIC=False
[Queen's pawn: Bronstein gambit]
ECO=A45
A1H8=d2d4 g8f6 g2g4
PGN=1. d4 Nf6 2. g4
BASIC=False
[Queen's pawn: Charlick (Englund) gambit]
ECO=A40
A1H8=d2d4 e7e5
PGN=1. d4 e5
BASIC=False
[Queen's pawn: Chigorin variation]
ECO=D00
A1H8=d2d4 d7d5 b1c3
PGN=1. d4 d5 2. Nc3
BASIC=False
[Queen's pawn: English defence]
ECO=A40
A1H8=d2d4 b7b6
PGN=1. d4 b6
BASIC=False
[Queen's pawn: Englund gambit]
ECO=A40
A1H8=d2d4 e7e5 d4e5 b8c6 g1f3 d8e7 d1d5 f7f6 e5f6 g8f6
PGN=1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Qd5 f6 5. exf6 Nxf6
BASIC=False
[Queen's pawn: Franco-Indian (Keres) defence]
ECO=A40
A1H8=d2d4 e7e6 c2c4 f8b4
PGN=1. d4 e6 2. c4 Bb4+
BASIC=False
[Queen's pawn: Keres defence]
ECO=A40
A1H8=d2d4 e7e6 c2c4 b7b6
PGN=1. d4 e6 2. c4 b6
BASIC=False
[Queen's pawn: Lundin (Kevitz-Mikenas) defence]
ECO=A40
A1H8=d2d4 b8c6
PGN=1. d4 Nc6
BASIC=False
[Queen's pawn: Mengarini attack]
ECO=E60
A1H8=d2d4 g8f6 c2c4 g7g6 d1c2
PGN=1. d4 Nf6 2. c4 g6 3. Qc2
BASIC=False
[Queen's pawn: Torre attack]
ECO=A46
A1H8=d2d4 g8f6 g1f3 e7e6 c1g5
PGN=1. d4 Nf6 2. Nf3 e6 3. Bg5
BASIC=False
[Queen's pawn: Torre attack, Wagner gambit]
ECO=A46
A1H8=d2d4 g8f6 g1f3 e7e6 c1g5 c7c5 e2e4
PGN=1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e4
BASIC=False
[Queen's pawn: Yusupov-Rubinstein system]
ECO=A46
A1H8=d2d4 g8f6 g1f3 e7e6 e2e3
PGN=1. d4 Nf6 2. Nf3 e6 3. e3
BASIC=False
[Queen's pawn: stonewall attack]
ECO=D00
A1H8=d2d4 d7d5 e2e3 g8f6 f1d3
PGN=1. d4 d5 2. e3 Nf6 3. Bd3
BASIC=False
[Reti accepted]
ECO=A09
A1H8=g1f3 d7d5 c2c4 d5c4
PGN=1. Nf3 d5 2. c4 dxc4
BASIC=False
[Reti accepted: Keres variation]
ECO=A09
A1H8=g1f3 d7d5 c2c4 d5c4 e2e3 c8e6
PGN=1. Nf3 d5 2. c4 dxc4 3. e3 Be6
BASIC=False
[Reti opening]
ECO=A04
A1H8=g1f3
PGN=1. Nf3
BASIC=True
[Reti v Dutch]
ECO=A04
A1H8=g1f3 f7f5
PGN=1. Nf3 f5
BASIC=False
[Reti: Herrstroem gambit]
ECO=A04
A1H8=g1f3 g7g5
PGN=1. Nf3 g5
BASIC=False
[Reti: King's Indian attack]
ECO=A05
A1H8=g1f3 g8f6 g2g3 g7g6
PGN=1. Nf3 Nf6 2. g3 g6
BASIC=False
[Reti: King's Indian attack (Barcza system)]
ECO=A07
A1H8=g1f3 d7d5 g2g3
PGN=1. Nf3 d5 2. g3
BASIC=True
[Reti: King's Indian attack (with ...c5)]
ECO=A07
A1H8=g1f3 d7d5 g2g3 c7c5
PGN=1. Nf3 d5 2. g3 c5
BASIC=False
[Reti: King's Indian attack, French variation]
ECO=A08
A1H8=g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 e1g1 e7e6 d2d3 g8f6 b1d2 f8e7 e2e4 e8g8 f1e1
PGN=1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. O-O e6 5. d3 Nf6 6. Nbd2 Be7 7. e4 O-O 8. Re1
BASIC=False
[Reti: King's Indian attack, Keres variation]
ECO=A07
A1H8=g1f3 d7d5 g2g3 c8g4 f1g2 b8d7
PGN=1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7
BASIC=False
[Reti: King's Indian attack, Pachman system]
ECO=A07
A1H8=g1f3 d7d5 g2g3 g7g6 f1g2 f8g7 e1g1 e7e5 d2d3 g8e7
PGN=1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7
BASIC=False
[Reti: King's Indian attack, Reti-Smyslov variation]
ECO=A05
A1H8=g1f3 g8f6 g2g3 g7g6 b2b4
PGN=1. Nf3 Nf6 2. g3 g6 3. b4
BASIC=False
[Reti: King's Indian attack, Spassky's variation]
ECO=A05
A1H8=g1f3 g8f6 g2g3 b7b5
PGN=1. Nf3 Nf6 2. g3 b5
BASIC=False
[Reti: King's Indian attack, Yugoslav variation]
ECO=A07
A1H8=g1f3 d7d5 g2g3 g8f6 f1g2 c7c6 e1g1 c8g4
PGN=1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. O-O Bg4
BASIC=False
[Reti: Lisitsin gambit deferred]
ECO=A04
A1H8=g1f3 f7f5 d2d3 g8f6 e2e4
PGN=1. Nf3 f5 2. d3 Nf6 3. e4
BASIC=False
[Reti: Nimzovich-Larsen attack]
ECO=A06
A1H8=g1f3 d7d5 b2b3
PGN=1. Nf3 d5 2. b3
BASIC=False
[Reti: Pirc-Lisitsin gambit]
ECO=A04
A1H8=g1f3 f7f5 e2e4
PGN=1. Nf3 f5 2. e4
BASIC=False
[Reti: Wade defence]
ECO=A04
A1H8=g1f3 d7d6 e2e4 c8g4
PGN=1. Nf3 d6 2. e4 Bg4
BASIC=False
[Reti: advance variation]
ECO=A09
A1H8=g1f3 d7d5 c2c4 d5d4
PGN=1. Nf3 d5 2. c4 d4
BASIC=False
[Reti: old Indian attack]
ECO=A06
A1H8=g1f3 d7d5 d2d3
PGN=1. Nf3 d5 2. d3
BASIC=False
[Reversed Grob (Borg/Basman defence/macho Grob)]
ECO=B00
A1H8=e2e4 g7g5
PGN=1. e4 g5
BASIC=False
[Richter-Veresov attack]
ECO=D01
A1H8=d2d4 d7d5 b1c3 g8f6 c1g5
PGN=1. d4 d5 2. Nc3 Nf6 3. Bg5
BASIC=False
[Richter-Veresov attack, Richter variation]
ECO=D01
A1H8=d2d4 d7d5 b1c3 g8f6 c1g5 c8f5 f2f3
PGN=1. d4 d5 2. Nc3 Nf6 3. Bg5 Bf5 4. f3
BASIC=False
[Richter-Veresov attack, Veresov variation]
ECO=D01
A1H8=d2d4 d7d5 b1c3 g8f6 c1g5 c8f5 g5f6
PGN=1. d4 d5 2. Nc3 Nf6 3. Bg5 Bf5 4. Bxf6
BASIC=False
[Robatsch (modern) defence]
ECO=B06
A1H8=e2e4 g7g6
PGN=1. e4 g6
BASIC=True
[Robatsch defence]
ECO=B06
A1H8=e2e4 g7g6 d2d4 f8g7 b1c3
PGN=1. e4 g6 2. d4 Bg7 3. Nc3
BASIC=False
[Robatsch defence: Geller's system]
ECO=B07
A1H8=e2e4 g7g6 d2d4 f8g7 g1f3 d7d6 c2c3
PGN=1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3
BASIC=False
[Robatsch defence: Gurgenidze variation]
ECO=B06
A1H8=e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 f2f4 d7d5 e4e5 h7h5
PGN=1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. f4 d5 5. e5 h5
BASIC=False
[Robatsch defence: Pseudo-Austrian attack]
ECO=B06
A1H8=e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 f2f4
PGN=1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4
BASIC=False
[Robatsch defence: Rossolimo variation]
ECO=B06
A1H8=e2e4 g7g6 d2d4 f8g7 g1f3 d7d6 c2c4 c8g4
PGN=1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c4 Bg4
BASIC=False
[Robatsch defence: three pawns attack]
ECO=B06
A1H8=e2e4 g7g6 d2d4 f8g7 f2f4
PGN=1. e4 g6 2. d4 Bg7 3. f4
BASIC=False
[Robatsch defence: two knights variation]
ECO=B06
A1H8=e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 g1f3
PGN=1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3
BASIC=False
[Robatsch defence: two knights, Suttles variation]
ECO=B06
A1H8=e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 g1f3 c7c6
PGN=1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 c6
BASIC=False
[Rousseau gambit]
ECO=C50
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 f7f5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 f5
BASIC=False
[Ruy Lopez]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4
BASIC=True
[Ruy Lopez (Spanish opening)]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5
BASIC=True
[Ruy Lopez: ...b5 & ...d6]
ECO=C78
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6
BASIC=False
[Ruy Lopez: 5.O-O]
ECO=C78
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O
BASIC=True
[Ruy Lopez: Alapin's defence deferred]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f8b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bb4
BASIC=False
[Ruy Lopez: Anderssen variation]
ECO=C77
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3
BASIC=False
[Ruy Lopez: Archangelsk (counterthrust) variation]
ECO=C78
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 c8b7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7
BASIC=False
[Ruy Lopez: Berlin defence]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6
BASIC=False
[Ruy Lopez: Berlin defence, 4.O-O]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O
BASIC=False
[Ruy Lopez: Berlin defence, 4.O-O, d6]
ECO=C66
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6
BASIC=False
[Ruy Lopez: Berlin defence, Anderssen variation]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 d7d6 b5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. Bxc6+
BASIC=False
[Ruy Lopez: Berlin defence, Beverwijk variation]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5
BASIC=False
[Ruy Lopez: Berlin defence, Cordel variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6f5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nf5
BASIC=False
[Ruy Lopez: Berlin defence, Duras variation]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 d7d6 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c4
BASIC=False
[Ruy Lopez: Berlin defence, Kaufmann variation]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 f8c5 c1e3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Be3
BASIC=False
[Ruy Lopez: Berlin defence, Minckwitz variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d4e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. dxe5
BASIC=False
[Ruy Lopez: Berlin defence, Mortimer trap]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 c6e7 f3e5 c7c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. Nxe5 c6
BASIC=False
[Ruy Lopez: Berlin defence, Mortimer variation]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 c6e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7
BASIC=False
[Ruy Lopez: Berlin defence, Nyholm attack]
ECO=C65
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d4 e5d4 e1g1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. O-O
BASIC=False
[Ruy Lopez: Berlin defence, Pillsbury variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 b2b3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. b3
BASIC=False
[Ruy Lopez: Berlin defence, Rio de Janeiro variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 b1c3 e8g8 f1e1 b7c5 f3d4 c5e6 c1e3 e6d4 e3d4 c6c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. Nc3 O-O 10. Re1 Nc5 11. Nd4 Ne6 12. Be3 Nxd4 13. Bxd4 c5
BASIC=False
[Ruy Lopez: Berlin defence, Rosenthal variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 a7a6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 a6
BASIC=False
[Ruy Lopez: Berlin defence, Tarrasch trap]
ECO=C66
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7 f1e1 e8g8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Re1 O-O
BASIC=False
[Ruy Lopez: Berlin defence, Trifunovic variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 d7d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 d5
BASIC=False
[Ruy Lopez: Berlin defence, Winawer attack]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 f3d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. Nd4
BASIC=False
[Ruy Lopez: Berlin defence, Zukertort variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. c4
BASIC=False
[Ruy Lopez: Berlin defence, hedgehog variation]
ECO=C66
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7
BASIC=False
[Ruy Lopez: Berlin defence, open variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4
BASIC=False
[Ruy Lopez: Bird's defence]
ECO=C61
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 c6d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4
BASIC=False
[Ruy Lopez: Bird's defence deferred]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 c6d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nd4
BASIC=False
[Ruy Lopez: Bird's defence, Paulsen variation]
ECO=C61
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 c6d4 f3d4 e5d4 e1g1 g8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O Ne7
BASIC=False
[Ruy Lopez: Brentano defence]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g7g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 g5
BASIC=False
[Ruy Lopez: Caro variation]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5
BASIC=False
[Ruy Lopez: Classical defence deferred]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5
BASIC=False
[Ruy Lopez: Cordel gambit]
ECO=C64
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 f7f5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 f5
BASIC=False
[Ruy Lopez: Cozio defence]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7
BASIC=False
[Ruy Lopez: Cozio defence deferred]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nge7
BASIC=False
[Ruy Lopez: Cozio defence, Paulsen variation]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8e7 b1c3 g7g6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. Nc3 g6
BASIC=False
[Ruy Lopez: Exchange variation doubly deferred (DERLD)]
ECO=C85
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 a4c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6
BASIC=False
[Ruy Lopez: Graz variation]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Bc5
BASIC=False
[Ruy Lopez: Lucena defence]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Be7
BASIC=False
[Ruy Lopez: Marshall counter-attack]
ECO=C89
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5
BASIC=False
[Ruy Lopez: Marshall counter-attack, 11...c6]
ECO=C89
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6
BASIC=False
[Ruy Lopez: Marshall, Herman Steiner variation]
ECO=C89
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 e5e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 e4
BASIC=False
[Ruy Lopez: Marshall, Kevitz variation]
ECO=C89
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 b3d5 c6d5 d2d4 e7d6 e5e3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. Bxd5 cxd5 13. d4 Bd6 14. Re3
BASIC=False
[Ruy Lopez: Marshall, main line, 12.d2d4]
ECO=C89
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4
BASIC=False
[Ruy Lopez: Marshall, main line, 14...Qh3]
ECO=C89
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4 e7d6 e5e1 d8h4 g2g3 h4h3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3
BASIC=False
[Ruy Lopez: Marshall, main line, Spassky variation]
ECO=C89
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4 e7d6 e5e1 d8h4 g2g3 h4h3 c1e3 c8g4 d1d3 a8e8 b1d2 e8e6 a2a4 h3h5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3 15. Be3 Bg4 16. Qd3 Rae8 17. Nd2 Re6 18. a4 Qh5
BASIC=False
[Ruy Lopez: Moeller defence]
ECO=C78
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5
BASIC=False
[Ruy Lopez: Morphy defence]
ECO=C77
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6
BASIC=True
[Ruy Lopez: Morphy defence, Duras variation]
ECO=C77
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d3 d7d6 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c4
BASIC=False
[Ruy Lopez: Noah's ark trap]
ECO=C71
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 d2d4 b7b5 a4b3 c6d4 f3d4 e5d4 d1d4 c7c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d4 b5 6. Bb3 Nxd4 7. Nxd4 exd4 8. Qxd4 c5
BASIC=False
[Ruy Lopez: Nuernberg variation]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f7f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 f6
BASIC=False
[Ruy Lopez: Pollock defence]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 c6a5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Na5
BASIC=False
[Ruy Lopez: Rabinovich variation]
ECO=C78
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 d7d6 f3g5 d6d5 e4d5 c6d4 f1e1 f8c5 e1e5 e8f8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. Ng5 d5 8. exd5 Nd4 9. Re1 Bc5 10. Rxe5+ Kf8
BASIC=False
[Ruy Lopez: Schliemann defence]
ECO=C63
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f7f5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 f5
BASIC=False
[Ruy Lopez: Schliemann defence deferred]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f7f5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5
BASIC=False
[Ruy Lopez: Schliemann defence, Berger variation]
ECO=C63
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3
BASIC=False
[Ruy Lopez: Siesta, Kopayev variation]
ECO=C74
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 f7f5 e4f5 c8f5 e1g1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5 6. exf5 Bxf5 7. O-O
BASIC=False
[Ruy Lopez: Steinitz defence deferred (Russian defence)]
ECO=C79
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6
BASIC=False
[Ruy Lopez: Steinitz defence deferred, Boleslavsky variation]
ECO=C79
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 f6e4 f1e1 f7f5 d4e5 d6d5 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4 8. Re1 f5 9. dxe5 d5 10. Nc3
BASIC=False
[Ruy Lopez: Steinitz defence deferred, Lipnitsky variation]
ECO=C79
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 c8g4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Bg4
BASIC=False
[Ruy Lopez: Steinitz defence deferred, Rubinstein variation]
ECO=C79
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 f6e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4
BASIC=False
[Ruy Lopez: Taimanov (chase/wing/accelerated counterthrust) variation]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 c6a5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5
BASIC=False
[Ruy Lopez: Trajkovic counter-attack]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 c8b7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 Bb7
BASIC=False
[Ruy Lopez: Treybal (Bayreuth) variation (exchange var. deferred)]
ECO=C77
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 a4c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Bxc6
BASIC=False
[Ruy Lopez: Vinogradov variation]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 d8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Qe7
BASIC=False
[Ruy Lopez: Wing attack]
ECO=C78
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 f8e7 a2a4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. a4
BASIC=False
[Ruy Lopez: Wormald (Alapin) attack]
ECO=C77
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d1e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2
BASIC=False
[Ruy Lopez: Wormald attack, Gruenfeld variation]
ECO=C77
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d1e2 b7b5 a4b3 f8e7 d2d4 d7d6 c2c3 c8g4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4
BASIC=False
[Ruy Lopez: Worrall attack]
ECO=C86
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2
BASIC=False
[Ruy Lopez: Worrall attack, sharp line]
ECO=C86
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2 b7b5 a4b3 e8g8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O
BASIC=False
[Ruy Lopez: Worrall attack, solid line]
ECO=C86
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2 b7b5 a4b3 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6
BASIC=False
[Ruy Lopez: classical (Cordel) defence]
ECO=C64
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5
BASIC=False
[Ruy Lopez: classical defence, 4.c3]
ECO=C64
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3
BASIC=False
[Ruy Lopez: classical defence, Benelux variation]
ECO=C64
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 g8f6 e1g1 e8g8 d2d4 c5b6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Nf6 5. O-O O-O 6. d4 Bb6
BASIC=False
[Ruy Lopez: classical defence, Boden variation]
ECO=C64
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 d8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Qe7
BASIC=False
[Ruy Lopez: classical defence, Charousek variation]
ECO=C64
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 c5b6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Bb6
BASIC=False
[Ruy Lopez: classical defence, Zaitsev variation]
ECO=C64
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 e1g1 c6d4 b2b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. b4
BASIC=False
[Ruy Lopez: closed]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3
BASIC=False
[Ruy Lopez: closed (10...c5)]
ECO=C96
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5
BASIC=False
[Ruy Lopez: closed (8...Na5)]
ECO=C96
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2
BASIC=False
[Ruy Lopez: closed (with ...d6)]
ECO=C90
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6
BASIC=False
[Ruy Lopez: closed Berlin defence, Bernstein variation]
ECO=C66
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7 c1g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bg5
BASIC=False
[Ruy Lopez: closed Berlin defence, Chigorin variation]
ECO=C66
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 f6d7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Nd7
BASIC=False
[Ruy Lopez: closed Berlin defence, Showalter variation]
ECO=C66
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7 b5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bxc6
BASIC=False
[Ruy Lopez: closed Berlin defence, Wolf variation]
ECO=C66
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 e5d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 exd4
BASIC=False
[Ruy Lopez: closed defence]
ECO=C84
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7
BASIC=False
[Ruy Lopez: closed, 7...O-O]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O
BASIC=False
[Ruy Lopez: closed, 7...d6, 8.d4]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. d4
BASIC=False
[Ruy Lopez: closed, 8.c3]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
BASIC=False
[Ruy Lopez: closed, 9.d4]
ECO=C91
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. d4
BASIC=False
[Ruy Lopez: closed, 9.h3]
ECO=C92
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3
BASIC=False
[Ruy Lopez: closed, Averbach variation]
ECO=C87
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 d6
BASIC=False
[Ruy Lopez: closed, Balla variation]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 a2a4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. a4
BASIC=False
[Ruy Lopez: closed, Basque gambit (North Spanish variation)]
ECO=C84
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4 e5d4 e4e5 f6e4 c2c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4 exd4 7. e5 Ne4 8. c3
BASIC=False
[Ruy Lopez: closed, Bogolyubov variation]
ECO=C91
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 d2d4 c8g4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. d4 Bg4
BASIC=False
[Ruy Lopez: closed, Borisenko defence]
ECO=C96
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5 d2d4 a5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Nc6
BASIC=False
[Ruy Lopez: closed, Breyer defence]
ECO=C94
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6b8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8
BASIC=False
[Ruy Lopez: closed, Breyer, 10.d4]
ECO=C95
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6b8 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8 10. d4
BASIC=False
[Ruy Lopez: closed, Breyer, Borisenko variation]
ECO=C95
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6b8 d2d4 b8d7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8 10. d4 Nbd7
BASIC=False
[Ruy Lopez: closed, Breyer, Gligoric variation]
ECO=C95
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6b8 d2d4 b8d7 b1d2 c8b7 b3c2 c7c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 c5
BASIC=False
[Ruy Lopez: closed, Breyer, Simagin variation]
ECO=C95
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6b8 d2d4 b8d7 f3h4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8 10. d4 Nbd7 11. Nh4
BASIC=False
[Ruy Lopez: closed, Chigorin defence]
ECO=C97
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7
BASIC=False
[Ruy Lopez: closed, Chigorin, 12...Nc6]
ECO=C98
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 a5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6
BASIC=False
[Ruy Lopez: closed, Chigorin, 12...c5d4]
ECO=C99
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 c5d4 c3d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4
BASIC=False
[Ruy Lopez: closed, Chigorin, Rauzer attack]
ECO=C98
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 a5c6 d4c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxc5
BASIC=False
[Ruy Lopez: closed, Chigorin, Yugoslav system]
ECO=C97
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 c8d7 d2f1 f8e8 f1e3 g7g6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfe8 14. Ne3 g6
BASIC=False
[Ruy Lopez: closed, Flohr-Zaitsev system (Lenzerheide variation)]
ECO=C92
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c8b7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Bb7
BASIC=False
[Ruy Lopez: closed, Keres (...Nd7) defence]
ECO=C96
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c5 d2d4 f6d7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Nd7
BASIC=False
[Ruy Lopez: closed, Keres (9...a5) variation]
ECO=C92
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 a6a5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 a5
BASIC=False
[Ruy Lopez: closed, Kholmov variation]
ECO=C92
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c8e6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Be6
BASIC=False
[Ruy Lopez: closed, Leonhardt variation]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 h2h3 a5c6 d4d5 c6b8 b1d2 g7g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. h3 Nc6 12. d5 Nb8 13. Nbd2 g5
BASIC=False
[Ruy Lopez: closed, Lutikov variation]
ECO=C90
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 b3c2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. Bc2
BASIC=False
[Ruy Lopez: closed, Pilnik variation]
ECO=C90
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 d2d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. d3
BASIC=False
[Ruy Lopez: closed, Ragozin-Petrosian (`Keres') variation]
ECO=C92
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 f6d7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nd7
BASIC=False
[Ruy Lopez: closed, Rossolimo defence]
ECO=C96
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 c6a5 b3c2 c7c6 d2d4 d8c7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c6 11. d4 Qc7
BASIC=False
[Ruy Lopez: closed, Smyslov defence]
ECO=C93
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 h2h3 h7h6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 h6
BASIC=False
[Ruy Lopez: closed, Suetin variation]
ECO=C90
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d6 a2a3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. a3
BASIC=False
[Ruy Lopez: closed, anti-Marshall 8.a4]
ECO=C88
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 a2a4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4
BASIC=False
[Ruy Lopez: closed, centre attack]
ECO=C84
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4
BASIC=False
[Ruy Lopez: exchange variation]
ECO=C68
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6
BASIC=False
[Ruy Lopez: exchange variation, 5.O-O]
ECO=C69
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O
BASIC=False
[Ruy Lopez: exchange variation, Alapin gambit]
ECO=C69
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 c8g4 h2h3 h7h5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bg4 6. h3 h5
BASIC=False
[Ruy Lopez: exchange, Alekhine variation]
ECO=C68
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 d2d4 e5d4 d1d4 d8d4 f3d4 c8d7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd7
BASIC=False
[Ruy Lopez: exchange, Bronstein variation]
ECO=C69
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 d8d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Qd6
BASIC=False
[Ruy Lopez: exchange, Gligoric variation]
ECO=C69
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 f7f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6
BASIC=False
[Ruy Lopez: exchange, Keres variation]
ECO=C68
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3
BASIC=False
[Ruy Lopez: exchange, Romanovsky variation]
ECO=C68
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 b1c3 f7f6 d2d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 f6 6. d3
BASIC=False
[Ruy Lopez: fianchetto (Smyslov/Barnes) defence]
ECO=C60
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g7g6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 g6
BASIC=False
[Ruy Lopez: fianchetto defence deferred]
ECO=C70
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g7g6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 g6
BASIC=False
[Ruy Lopez: four knights (Tarrasch) variation]
ECO=C77
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3
BASIC=False
[Ruy Lopez: modern Steinitz defence]
ECO=C71
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6
BASIC=False
[Ruy Lopez: modern Steinitz defence, 5.O-O]
ECO=C72
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 e1g1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O
BASIC=False
[Ruy Lopez: modern Steinitz defence, Alapin variation]
ECO=C73
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 a4c6 b7c6 d2d4 f7f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6
BASIC=False
[Ruy Lopez: modern Steinitz defence, Duras (Keres) variation]
ECO=C71
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4
BASIC=False
[Ruy Lopez: modern Steinitz defence, Richter variation]
ECO=C73
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 a4c6 b7c6 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4
BASIC=False
[Ruy Lopez: modern Steinitz defence, Rubinstein variation]
ECO=C75
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 c8d7 d2d4 g8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nge7
BASIC=False
[Ruy Lopez: modern Steinitz defence, Three knights variation]
ECO=C71
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Nc3
BASIC=False
[Ruy Lopez: modern Steinitz defence, fianchetto (Bronstein) variation]
ECO=C76
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 c8d7 d2d4 g7g6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6
BASIC=False
[Ruy Lopez: modern Steinitz defence, siesta variation]
ECO=C74
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 f7f5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5
BASIC=False
[Ruy Lopez: old Steinitz defence]
ECO=C62
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 d7d6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 d6
BASIC=False
[Ruy Lopez: old Steinitz defence, Nimzovich attack]
ECO=C62
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 b1c3 g8f6 b5c6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. Bxc6
BASIC=False
[Ruy Lopez: old Steinitz defence, semi-Duras variation]
ECO=C62
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. c4
BASIC=False
[Ruy Lopez: open (Tarrasch) defence]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4
BASIC=False
[Ruy Lopez: open Berlin defence, 5...Be7]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7
BASIC=False
[Ruy Lopez: open Berlin defence, Showalter variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5a4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Ba4
BASIC=False
[Ruy Lopez: open Berlin defence, l'Hermet variation]
ECO=C67
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 d4e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. dxe5
BASIC=False
[Ruy Lopez: open, 6.d4]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4
BASIC=False
[Ruy Lopez: open, 6.d4 b5]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5
BASIC=False
[Ruy Lopez: open, 7.Bb3]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3
BASIC=False
[Ruy Lopez: open, 8...Be6]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6
BASIC=False
[Ruy Lopez: open, 8.de]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
BASIC=False
[Ruy Lopez: open, 9...Be7, 10.Re1]
ECO=C83
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 f1e1
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Re1
BASIC=False
[Ruy Lopez: open, 9.c3]
ECO=C82
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3
BASIC=False
[Ruy Lopez: open, Berger variation]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 a2a4 c6d4 f3d4 e5d4 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. a4 Nxd4 9. Nxd4 exd4 10. Nc3
BASIC=False
[Ruy Lopez: open, Berlin variation]
ECO=C82
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 e4c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Nc5
BASIC=False
[Ruy Lopez: open, Bernstein variation]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2
BASIC=False
[Ruy Lopez: open, Bernstein variation, Karpov gambit]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2 e4c5 c2c3 d5d4 f3g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 d4 11. Ng5
BASIC=False
[Ruy Lopez: open, Breslau variation]
ECO=C83
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 f1e1 e8g8 f3d4 c6e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Nxe5
BASIC=False
[Ruy Lopez: open, Dilworth variation]
ECO=C82
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 b1d2 e8g8 b3c2 e4f2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Nbd2 O-O 11. Bc2 Nxf2
BASIC=False
[Ruy Lopez: open, Friess attack]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 f3e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Nxe5
BASIC=False
[Ruy Lopez: open, Harksen gambit]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. c4
BASIC=False
[Ruy Lopez: open, Howell attack]
ECO=C81
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2
BASIC=False
[Ruy Lopez: open, Howell attack, Adam variation]
ECO=C81
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2 f8e7 c2c4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. c4
BASIC=False
[Ruy Lopez: open, Howell attack, Ekstroem variation]
ECO=C81
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2 f8e7 f1d1 e8g8 c2c4 b5c4 b3c4 d8d7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Qd7
BASIC=False
[Ruy Lopez: open, Italian variation]
ECO=C82
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5
BASIC=False
[Ruy Lopez: open, Knorre variation]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Nc3
BASIC=False
[Ruy Lopez: open, Malkin variation]
ECO=C83
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 b1d2 e8g8 d1e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Nbd2 O-O 11. Qe2
BASIC=False
[Ruy Lopez: open, Motzko attack]
ECO=C82
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 d1d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Qd3
BASIC=False
[Ruy Lopez: open, Motzko attack, Nenarokov variation]
ECO=C82
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 d1d3 c6e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Qd3 Ne7
BASIC=False
[Ruy Lopez: open, Richter variation]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 d4d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. d5
BASIC=False
[Ruy Lopez: open, Riga variation]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 e5d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 exd4
BASIC=False
[Ruy Lopez: open, Schlechter defence]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 a2a4 c6d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. a4 Nxd4
BASIC=False
[Ruy Lopez: open, St. Petersburg variation]
ECO=C82
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 b1d2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Nbd2
BASIC=False
[Ruy Lopez: open, Tarrasch trap]
ECO=C83
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 f1e1 e8g8 f3d4 d8d7 d4e6 f7e6 e1e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Qd7 12. Nxe6 fxe6 13. Rxe4
BASIC=False
[Ruy Lopez: open, Tartakower variation]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d1e2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Qe2
BASIC=False
[Ruy Lopez: open, Zukertort variation]
ECO=C80
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c6e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Ne7
BASIC=False
[Ruy Lopez: open, classical defence]
ECO=C83
A1H8=e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7
BASIC=False
[Santasiere's folly]
ECO=A06
A1H8=g1f3 d7d5 b2b4
PGN=1. Nf3 d5 2. b4
BASIC=False
[Saragossa opening]
ECO=A00
A1H8=c2c3
PGN=1. c3
BASIC=False
[Scandinavian (centre counter) defence]
ECO=B01
A1H8=e2e4 d7d5
PGN=1. e4 d5
BASIC=True
[Scandinavian defence]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5
BASIC=False
[Scandinavian defence, Gruenfeld variation]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5 f3e5 c7c6 g2g4
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Ne5 c6 7. g4
BASIC=False
[Scandinavian defence, Lasker variation]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8g4 h2h3
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bg4 6. h3
BASIC=True
[Scandinavian gambit]
ECO=B01
A1H8=e2e4 d7d5 e4d5 g8f6 c2c4 c7c6
PGN=1. e4 d5 2. exd5 Nf6 3. c4 c6
BASIC=False
[Scandinavian, Mieses-Kotrvc gambit]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 b2b4
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. b4
BASIC=False
[Scandinavian: Anderssen counter-attack]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5
BASIC=False
[Scandinavian: Anderssen counter-attack orthodox attack]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 d4e5 f8b4 c1d2 b8c6 g1f3
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. dxe5 Bb4 6. Bd2 Nc6 7. Nf3
BASIC=False
[Scandinavian: Anderssen counter-attack, Collijn variation]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3 c8g4
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3 Bg4
BASIC=False
[Scandinavian: Anderssen counter-attack, Goteborg system]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3
BASIC=False
[Scandinavian: Icelandic gambit]
ECO=B01
A1H8=e2e4 d7d5 e4d5 g8f6 c2c4 e7e6
PGN=1. e4 d5 2. exd5 Nf6 3. c4 e6
BASIC=False
[Scandinavian: Kiel variation]
ECO=B01
A1H8=e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 c2c4 d5b4
PGN=1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb4
BASIC=False
[Scandinavian: Marshall variation]
ECO=B01
A1H8=e2e4 d7d5 e4d5 g8f6 d2d4 f6d5
PGN=1. e4 d5 2. exd5 Nf6 3. d4 Nxd5
BASIC=False
[Scandinavian: Pytel-Wade variation]
ECO=B01
A1H8=e2e4 d7d5 e4d5 d8d5 b1c3 d5d6
PGN=1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6
BASIC=False
[Scandinavian: Richter variation]
ECO=B01
A1H8=e2e4 d7d5 e4d5 g8f6 d2d4 g7g6
PGN=1. e4 d5 2. exd5 Nf6 3. d4 g6
BASIC=False
[Scotch gambit]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4
BASIC=False
[Scotch gambit: Anderssen (Paulsen, Suhle) counter-attack]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 e1g1 d7d6 c2c3 c8g4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. O-O d6 6. c3 Bg4
BASIC=False
[Scotch gambit: Benima defence]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Be7
BASIC=False
[Scotch gambit: Cochrane variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4 c2c3 d4c3 b2c3 b4a5 e4e5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. bxc3 Ba5 7. e5
BASIC=False
[Scotch gambit: Cochrane-Shumov defence]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5 g8h6 g5f7 h6f7 c4f7 e8f7 d1h5 g7g6 h5c5 d7d5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Nxf7 Nxf7 7. Bxf7+ Kxf7 8. Qh5+ g6 9. Qxc5 d5
BASIC=False
[Scotch gambit: Dubois-Reti defence]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6
BASIC=False
[Scotch gambit: Hanneken variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4 c2c3 d4c3 e1g1 c3b2 c1b2 g8f6 f3g5 e8g8 e4e5 c6e5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. O-O cxb2 7. Bxb2 Nf6 8. Ng5 O-O 9. e5 Nxe5
BASIC=False
[Scotch gambit: Vitzhum attack]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5 g8h6 d1h5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Qh5
BASIC=False
[Scotch game]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4
BASIC=False
[Scotch opening]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4
BASIC=False
[Scotch: Berger variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 b1d2 h4e4 f1e2 e4g2 e2f3 g2h3 b5c7 e8d8 c7a8 g8f6 a2a3
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Nd2 Qxe4+ 7. Be2 Qxg2 8. Bf3 Qh3 9. Nxc7+ Kd8 10. Nxa8 Nf6 11. a3
BASIC=False
[Scotch: Blackburne attack]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d1d2
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2
BASIC=False
[Scotch: Blumenfeld attack]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 d4b5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5
BASIC=False
[Scotch: Cochrane variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 c6d4 f3e5 d4e6 f1c4 c7c6 e1g1 g8f6 e5f7
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxe5 Ne6 5. Bc4 c6 6. O-O Nf6 7. Nxf7
BASIC=False
[Scotch: Fraser attack]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4f3
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nf3
BASIC=False
[Scotch: Ghulam Kassim variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 c6d4 d1d4 d7d6 f1d3
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Bd3
BASIC=False
[Scotch: Goering gambit]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3
BASIC=False
[Scotch: Goering gambit, Bardeleben variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 b1c3 f8b4 f1c4 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 Bb4 6. Bc4 Nf6
BASIC=False
[Scotch: Gottschall variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d1d2 d7d5 d4b5 c5e3 d2e3 e8g8 b5c7 a8b8 c7d5 e7d5 e4d5 c6b4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2 d5 8. Nb5 Bxe3 9. Qxe3 O-O 10. Nxc7 Rb8 11. Nxd5 Nxd5 12. exd5 Nb4
BASIC=False
[Scotch: Horwitz attack]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5
BASIC=False
[Scotch: Lolli variation]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 c6d4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4
BASIC=False
[Scotch: Meitner variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d4c2
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Nc2
BASIC=False
[Scotch: Mieses variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 d4c6 b7c6 e4e5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5
BASIC=False
[Scotch: Paulsen attack]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 f1b5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5
BASIC=False
[Scotch: Paulsen, Gunsberg defence]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 f1b5 c6d8
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5 Nd8
BASIC=False
[Scotch: Potter variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4b3
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3
BASIC=False
[Scotch: Pulling counter-attack]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4
BASIC=False
[Scotch: Relfsson gambit ('MacLopez')]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1b5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bb5
BASIC=False
[Scotch: Romanishin variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4b3 c5b4
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb4+
BASIC=False
[Scotch: Rosenthal variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 c1d2 h4e4 f1e2 e8d8 e1g1 b4d2 b1d2 e4g6
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2 Qxe4+ 7. Be2 Kd8 8. O-O Bxd2 9. Nxd2 Qg6
BASIC=False
[Scotch: Schmidt variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6
BASIC=False
[Scotch: Sea-cadet mate]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 b1c3 d7d6 f1c4 c8g4 e1g1 c6e5 f3e5 g4d1 c4f7 e8e7 c3d5
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 Bg4 7. O-O Ne5 8. Nxe5 Bxd1 9. Bxf7+ Ke7 10. Nd5#
BASIC=False
[Scotch: Steinitz variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nc3
BASIC=False
[Scotch: Tartakower variation]
ECO=C45
A1H8=e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 d4c6 b7c6 b1d2
PGN=1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Nd2
BASIC=False
[Semi-Benoni (`blockade variation')]
ECO=A44
A1H8=d2d4 c7c5 d4d5 e7e5 e2e4 d7d6
PGN=1. d4 c5 2. d5 e5 3. e4 d6
BASIC=False
[Sicilian]
ECO=B50
A1H8=e2e4 c7c5 g1f3 d7d6
PGN=1. e4 c5 2. Nf3 d6
BASIC=False
[Sicilian defence]
ECO=B20
A1H8=e2e4 c7c5
PGN=1. e4 c5
BASIC=True
[Sicilian, Chekhover variation]
ECO=B53
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4
BASIC=False
[Sicilian, Szen (`anti-Taimanov') variation]
ECO=B44
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5
BASIC=False
[Sicilian, Szen variation, Dely-Kasparov gambit]
ECO=B44
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5 d7d6 c2c4 g8f6 b1c3 a7a6 b5a3 d6d5
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3 d5
BASIC=False
[Sicilian, Szen, hedgehog variation]
ECO=B44
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5 d7d6 c2c4 g8f6 b1c3 a7a6 b5a3 f8e7 f1e2 e8g8 e1g1 b7b6
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3 Be7 9. Be2 O-O 10. O-O b6
BASIC=False
[Sicilian: 2.c3, Heidenfeld variation]
ECO=B22
A1H8=e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 b1a3
PGN=1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3
BASIC=False
[Sicilian: Acton extension]
ECO=B27
A1H8=e2e4 c7c5 g1f3 g7g6 c2c4 f8h6
PGN=1. e4 c5 2. Nf3 g6 3. c4 Bh6
BASIC=False
[Sicilian: Alapin's variation (2.c3)]
ECO=B22
A1H8=e2e4 c7c5 c2c3
PGN=1. e4 c5 2. c3
BASIC=False
[Sicilian: Anderssen variation]
ECO=B40
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6
BASIC=False
[Sicilian: Andreaschek gambit]
ECO=B21
A1H8=e2e4 c7c5 d2d4 c5d4 g1f3 e7e5 c2c3
PGN=1. e4 c5 2. d4 cxd4 3. Nf3 e5 4. c3
BASIC=False
[Sicilian: Boleslavsky variation]
ECO=B58
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5
BASIC=False
[Sicilian: Boleslavsky variation, 7.Nb3]
ECO=B59
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4b3
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3
BASIC=False
[Sicilian: Boleslavsky, Louma variation]
ECO=B58
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4c6
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6
BASIC=False
[Sicilian: Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack]
ECO=B51
A1H8=e2e4 c7c5 g1f3 d7d6 f1b5
PGN=1. e4 c5 2. Nf3 d6 3. Bb5+
BASIC=False
[Sicilian: Canal-Sokolsky attack, 3...Bd7]
ECO=B52
A1H8=e2e4 c7c5 g1f3 d7d6 f1b5 c8d7
PGN=1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7
BASIC=False
[Sicilian: Canal-Sokolsky attack, Bronstein gambit]
ECO=B52
A1H8=e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 e1g1 b8c6 c2c3 g8f6 d2d4
PGN=1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c3 Nf6 7. d4
BASIC=False
[Sicilian: Canal-Sokolsky attack, Sokolsky variation]
ECO=B52
A1H8=e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 c2c4
PGN=1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4
BASIC=False
[Sicilian: Chekhover, Zaitsev variation]
ECO=B53
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4 b8c6 f1b5 d8d7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Qd7
BASIC=False
[Sicilian: Flohr variation]
ECO=B32
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d8c7
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qc7
BASIC=False
[Sicilian: Gloria variation]
ECO=B20
A1H8=e2e4 c7c5 c2c4 d7d6 b1c3 b8c6 g2g3 h7h5
PGN=1. e4 c5 2. c4 d6 3. Nc3 Nc6 4. g3 h5
BASIC=False
[Sicilian: Grand Prix attack]
ECO=B21
A1H8=e2e4 c7c5 f2f4
PGN=1. e4 c5 2. f4
BASIC=False
[Sicilian: Grand Prix attack, Schofman variation]
ECO=B23
A1H8=e2e4 c7c5 b1c3 b8c6 f2f4 g7g6 g1f3 f8g7 f1c4 e7e6 f4f5
PGN=1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5
BASIC=False
[Sicilian: Hungarian variation]
ECO=B27
A1H8=e2e4 c7c5 g1f3 g7g6
PGN=1. e4 c5 2. Nf3 g6
BASIC=False
[Sicilian: Kan variation]
ECO=B41
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6
BASIC=False
[Sicilian: Kan, 5.Bd3]
ECO=B42
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3
BASIC=False
[Sicilian: Kan, 5.Nc3]
ECO=B43
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3
BASIC=False
[Sicilian: Kan, Gipslis variation]
ECO=B42
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 g8f6 e1g1 d7d6 c2c4 g7g6
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 g6
BASIC=False
[Sicilian: Kan, Maroczy bind (Reti variation)]
ECO=B41
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4
BASIC=False
[Sicilian: Kan, Maroczy bind - Bronstein variation]
ECO=B41
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4 g8f6 b1c3 f8b4 f1d3 b8c6 d3c2
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 8. Bc2
BASIC=False
[Sicilian: Kan, Polugaievsky variation]
ECO=B42
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 f8c5
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5
BASIC=False
[Sicilian: Kan, Swiss cheese variation]
ECO=B42
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 g7g6
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6
BASIC=False
[Sicilian: Katalimov variation]
ECO=B27
A1H8=e2e4 c7c5 g1f3 b7b6
PGN=1. e4 c5 2. Nf3 b6
BASIC=False
[Sicilian: Keres variation (2.Ne2)]
ECO=B20
A1H8=e2e4 c7c5 g1e2
PGN=1. e4 c5 2. Ne2
BASIC=False
[Sicilian: Labourdonnais-Loewenthal (Kalashnikov) variation]
ECO=B32
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5 d4b5 d7d6
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6
BASIC=False
[Sicilian: Labourdonnais-Loewenthal variation]
ECO=B32
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5
BASIC=False
[Sicilian: Magnus Smith trap]
ECO=B57
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4 g7g6 d4c6 b7c6 e4e5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 g6 7. Nxc6 bxc6 8. e5
BASIC=False
[Sicilian: Marshall variation]
ECO=B40
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 d7d5
PGN=1. e4 c5 2. Nf3 e6 3. d4 d5
BASIC=False
[Sicilian: Najdorf]
ECO=B90
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6
BASIC=False
[Sicilian: Najdorf variation]
ECO=B98
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 d8c7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7
BASIC=False
[Sicilian: Najdorf, 6...e6]
ECO=B95
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6
BASIC=False
[Sicilian: Najdorf, 6.Bg5]
ECO=B94
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5
BASIC=False
[Sicilian: Najdorf, 6.f4]
ECO=B93
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f2f4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4
BASIC=False
[Sicilian: Najdorf, 7...Be7]
ECO=B98
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7
BASIC=False
[Sicilian: Najdorf, 7...Be7 main line]
ECO=B99
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 d8c7 e1c1 b8d7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7
BASIC=False
[Sicilian: Najdorf, 7...Qb6]
ECO=B97
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6
BASIC=False
[Sicilian: Najdorf, 7.f4]
ECO=B96
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4
BASIC=False
[Sicilian: Najdorf, Adams attack]
ECO=B90
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 h2h3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3
BASIC=False
[Sicilian: Najdorf, Browne variation]
ECO=B98
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 h7h6 g5h4 d8c7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. Bh4 Qc7
BASIC=False
[Sicilian: Najdorf, Byrne (English) attack]
ECO=B90
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3
BASIC=False
[Sicilian: Najdorf, Goteborg (Argentine) variation]
ECO=B98
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 h7h6 g5h4 g7g5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. Bh4 g5
BASIC=False
[Sicilian: Najdorf, Ivkov variation]
ECO=B94
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 b8d7 f1c4 d8a5 d1d2 e7e6 e1c1 b7b5 c4b3 c8b7 h1e1 d7c5 e4e5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 Qa5 8. Qd2 e6 9. O-O-O b5 10. Bb3 Bb7 11. Rhe1 Nc5 12. e5
BASIC=False
[Sicilian: Najdorf, Lipnitzky attack]
ECO=B90
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1c4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4
BASIC=False
[Sicilian: Najdorf, Opovcensky variation]
ECO=B92
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2
BASIC=False
[Sicilian: Najdorf, Poisoned pawn variation]
ECO=B97
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6 d1d2 b6b2 a1b1 b2a3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Rb1 Qa3
BASIC=False
[Sicilian: Najdorf, Polugayevsky variation]
ECO=B96
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b7b5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5
BASIC=False
[Sicilian: Najdorf, Polugayevsky, Simagin variation]
ECO=B96
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b7b5 e4e5 d6e5 f4e5 d8c7 d1e2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. e5 dxe5 9. fxe5 Qc7 10. Qe2
BASIC=False
[Sicilian: Najdorf, Zagreb (fianchetto) variation]
ECO=B91
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 g2g3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3
BASIC=False
[Sicilian: Nimzovich variation]
ECO=B32
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d7d5
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d5
BASIC=False
[Sicilian: Nimzovich-Rossolimo attack (with ...g6, without ...d6)]
ECO=B31
A1H8=e2e4 c7c5 g1f3 b8c6 f1b5 g7g6
PGN=1. e4 c5 2. Nf3 Nc6 3. Bb5 g6
BASIC=False
[Sicilian: Nimzovich-Rossolimo attack (without ...d6)]
ECO=B30
A1H8=e2e4 c7c5 g1f3 b8c6 f1b5
PGN=1. e4 c5 2. Nf3 Nc6 3. Bb5
BASIC=False
[Sicilian: Nimzovich-Rossolimo attack, Gurgenidze variation]
ECO=B31
A1H8=e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 f1e1 e7e5 b2b4
PGN=1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. b4
BASIC=False
[Sicilian: Nimzovich-Rubinstein variation]
ECO=B29
A1H8=e2e4 c7c5 g1f3 g8f6
PGN=1. e4 c5 2. Nf3 Nf6
BASIC=False
[Sicilian: Nimzovich-Rubinstein; Rubinstein counter-gambit]
ECO=B29
A1H8=e2e4 c7c5 g1f3 g8f6 e4e5 f6d5 b1c3 e7e6 c3d5 e6d5 d2d4 b8c6
PGN=1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 e6 5. Nxd5 exd5 6. d4 Nc6
BASIC=False
[Sicilian: O'Kelly variation]
ECO=B28
A1H8=e2e4 c7c5 g1f3 a7a6
PGN=1. e4 c5 2. Nf3 a6
BASIC=False
[Sicilian: Pelikan (Lasker/Sveshnikov) variation]
ECO=B33
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5
BASIC=False
[Sicilian: Pelikan, Bird variation]
ECO=B33
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 c8e6
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 Be6
BASIC=False
[Sicilian: Pelikan, Chelyabinsk variation]
ECO=B33
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5
BASIC=False
[Sicilian: Pin variation (Sicilian counter-attack)]
ECO=B40
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4
BASIC=False
[Sicilian: Pin, Jaffe variation]
ECO=B40
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4 f1d3 e6e5
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Bd3 e5
BASIC=False
[Sicilian: Pin, Koch variation]
ECO=B40
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4 e4e5
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5
BASIC=False
[Sicilian: Prins (Moscow) variation]
ECO=B54
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3
BASIC=False
[Sicilian: Prins variation, Venice attack]
ECO=B55
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3 e7e5 f1b5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+
BASIC=False
[Sicilian: Quinteros variation]
ECO=B27
A1H8=e2e4 c7c5 g1f3 d8c7
PGN=1. e4 c5 2. Nf3 Qc7
BASIC=False
[Sicilian: Richter-Rauzer]
ECO=B60
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5
BASIC=False
[Sicilian: Richter-Rauzer, 6...e6]
ECO=B62
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6
BASIC=False
[Sicilian: Richter-Rauzer, Bondarevsky variation]
ECO=B60
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 g7g6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 g6
BASIC=False
[Sicilian: Richter-Rauzer, Keres variation]
ECO=B62
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd3
BASIC=False
[Sicilian: Richter-Rauzer, Larsen variation]
ECO=B60
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 c8d7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7
BASIC=False
[Sicilian: Richter-Rauzer, Larsen variation, 7.Qd2]
ECO=B61
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 c8d7 d1d2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 7. Qd2
BASIC=False
[Sicilian: Richter-Rauzer, Margate (Alekhine) variation]
ECO=B62
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 f1b5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Bb5
BASIC=False
[Sicilian: Richter-Rauzer, Podvebrady variation]
ECO=B62
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d4b3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nb3
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack]
ECO=B63
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7]
ECO=B63
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4]
ECO=B65
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 c6d4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 Nxd4
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4]
ECO=B64
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, 7...a6]
ECO=B66
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 a7a6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6]
ECO=B69
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7 d4f3 b7b5 g5f6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7 10. Nf3 b5 11. Bxf6
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7]
ECO=B67
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7]
ECO=B68
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7
BASIC=False
[Sicilian: Richter-Rauzer, Rauzer attack, Geller variation]
ECO=B64
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 e6e5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 e5
BASIC=False
[Sicilian: Richter-Rauzer, Richter attack]
ECO=B62
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d4c6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nxc6
BASIC=False
[Sicilian: Scheveningen (Paulsen), classical variation]
ECO=B84
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 a7a6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6
BASIC=False
[Sicilian: Scheveningen variation]
ECO=B80
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6
BASIC=False
[Sicilian: Scheveningen, 6.Be2]
ECO=B83
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2
BASIC=False
[Sicilian: Scheveningen, 6.f4]
ECO=B82
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f2f4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4
BASIC=False
[Sicilian: Scheveningen, English variation]
ECO=B80
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 c1e3 a7a6 d1d2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 a6 7. Qd2
BASIC=False
[Sicilian: Scheveningen, Keres attack]
ECO=B81
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 g2g4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4
BASIC=False
[Sicilian: Scheveningen, Tal variation]
ECO=B82
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f2f4 b8c6 c1e3 f8e7 d1f3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 Nc6 7. Be3 Be7 8. Qf3
BASIC=False
[Sicilian: Scheveningen, Vitolins variation]
ECO=B80
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1b5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bb5+
BASIC=False
[Sicilian: Scheveningen, classical]
ECO=B85
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 a7a6 e1g1 d8c7 f2f4 b8c6 c1e3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8. f4 Nc6 9. Be3
BASIC=False
[Sicilian: Scheveningen, classical main line]
ECO=B85
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 a7a6 e1g1 d8c7 f2f4 b8c6 c1e3 f8e7 d1e1 e8g8
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8. f4 Nc6 9. Be3 Be7 10. Qe1 O-O
BASIC=False
[Sicilian: Scheveningen, classical variation with ...Qc7 and ...Nc6]
ECO=B85
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 a7a6 e1g1 d8c7 f2f4 b8c6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8. f4 Nc6
BASIC=False
[Sicilian: Scheveningen, classical, Maroczy system]
ECO=B85
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 a7a6 e1g1 d8c7 f2f4 b8c6 g1h1 f8e7 a2a4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8. f4 Nc6 9. Kh1 Be7 10. a4
BASIC=False
[Sicilian: Scheveningen, classical, Nd7 system]
ECO=B84
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 a7a6 e1g1 b8d7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Nbd7
BASIC=False
[Sicilian: Scheveningen, fianchetto variation]
ECO=B80
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 g2g3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3
BASIC=False
[Sicilian: Smith-Morra gambit]
ECO=B21
A1H8=e2e4 c7c5 d2d4
PGN=1. e4 c5 2. d4
BASIC=False
[Sicilian: Smith-Morra gambit, Chicago defence]
ECO=B21
A1H8=e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 d7d6 f1c4 e7e6 e1g1 a7a6 d1e2 b7b5 c4b3 a8a7
PGN=1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. O-O a6 8. Qe2 b5 9. Bb3 Ra7
BASIC=False
[Sicilian: Sozin attack]
ECO=B86
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1c4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4
BASIC=False
[Sicilian: Sozin with ...a6 and ...b5]
ECO=B87
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1c4 a7a6 c4b3 b7b5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 a6 7. Bb3 b5
BASIC=False
[Sicilian: Sozin, 7.Be3]
ECO=B89
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1c4 b8c6 c1e3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Be3
BASIC=False
[Sicilian: Sozin, Benko variation]
ECO=B57
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4 d8b6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 Qb6
BASIC=False
[Sicilian: Sozin, Fischer variation]
ECO=B88
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1c4 b8c6 c4b3 f8e7 c1e3 e8g8 f2f4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Bb3 Be7 8. Be3 O-O 9. f4
BASIC=False
[Sicilian: Sozin, Leonhardt variation]
ECO=B88
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1c4 b8c6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6
BASIC=False
[Sicilian: Sozin, not Scheveningen]
ECO=B57
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4
BASIC=False
[Sicilian: Steinitz variation]
ECO=B20
A1H8=e2e4 c7c5 g2g3
PGN=1. e4 c5 2. g3
BASIC=False
[Sicilian: Stiletto (Althouse) variation]
ECO=B27
A1H8=e2e4 c7c5 g1f3 d8a5
PGN=1. e4 c5 2. Nf3 Qa5
BASIC=False
[Sicilian: Sveshnikov variation]
ECO=B33
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f6f5
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5
BASIC=False
[Sicilian: Taimanov (Bastrikov) variation]
ECO=B47
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7
BASIC=False
[Sicilian: Taimanov variation]
ECO=B45
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3
BASIC=False
[Sicilian: Taimanov, American attack]
ECO=B45
A1H8=e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 g8f6 d4b5 f8b4 b5d6
PGN=1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. Nd6+
BASIC=False
[Sicilian: Velimirovic attack]
ECO=B89
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1c4 b8c6 c1e3 f8e7 d1e2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Be3 Be7 8. Qe2
BASIC=False
[Sicilian: Venice attack]
ECO=B56
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 f1b5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+
BASIC=False
[Sicilian: accelerated fianchetto, Breyer variation]
ECO=B39
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3 g8f6 b1c3 f6g4
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4
BASIC=False
[Sicilian: accelerated fianchetto, Gurgenidze variation]
ECO=B36
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 g8f6 b1c3 c6d4 d1d4 d7d6
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6
BASIC=False
[Sicilian: accelerated fianchetto, Maroczy bind]
ECO=B36
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4
BASIC=False
[Sicilian: accelerated fianchetto, Maroczy bind, 5...Bg7]
ECO=B37
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7
BASIC=False
[Sicilian: accelerated fianchetto, Maroczy bind, 6.Be3]
ECO=B38
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3
BASIC=False
[Sicilian: accelerated fianchetto, Simagin variation]
ECO=B37
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 d4c2 d7d6 f1e2 g8h6
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Nc2 d6 7. Be2 Nh6
BASIC=False
[Sicilian: accelerated fianchetto, exchange variation]
ECO=B34
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 d4c6
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6
BASIC=False
[Sicilian: accelerated fianchetto, modern variation]
ECO=B34
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3
BASIC=False
[Sicilian: accelerated fianchetto, modern variation with Bc4]
ECO=B35
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1c4
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4
BASIC=False
[Sicilian: chameleon variation]
ECO=B23
A1H8=e2e4 c7c5 b1c3 b8c6 g1e2
PGN=1. e4 c5 2. Nc3 Nc6 3. Nge2
BASIC=False
[Sicilian: classical]
ECO=B58
A1H8=e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2
PGN=1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2
BASIC=True
[Sicilian: closed]
ECO=B23
A1H8=e2e4 c7c5 b1c3
PGN=1. e4 c5 2. Nc3
BASIC=False
[Sicilian: closed, 2...Nc6]
ECO=B23
A1H8=e2e4 c7c5 b1c3 b8c6
PGN=1. e4 c5 2. Nc3 Nc6
BASIC=False
[Sicilian: closed, 6.Be3]
ECO=B26
A1H8=e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 c1e3
PGN=1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3
BASIC=False
[Sicilian: closed, 6.Ne2 e5 (Botvinnik)]
ECO=B25
A1H8=e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 g1e2 e7e5
PGN=1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e5
BASIC=False
[Sicilian: closed, 6.f4]
ECO=B25
A1H8=e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4
PGN=1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4
BASIC=False
[Sicilian: closed, 6.f4 e5 (Botvinnik)]
ECO=B25
A1H8=e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4 e7e5
PGN=1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5
BASIC=False
[Sicilian: closed, Korchnoi variation]
ECO=B23
A1H8=e2e4 c7c5 b1c3 e7e6 g2g3 d7d5
PGN=1. e4 c5 2. Nc3 e6 3. g3 d5
BASIC=False
[Sicilian: closed, Smyslov variation]
ECO=B24
A1H8=e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 e7e6 c1e3 c6d4 c3e2
PGN=1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 Nd4 7. Nce2
BASIC=False
[Sicilian: dragon variation]
ECO=B70
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6
BASIC=False
[Sicilian: dragon, 6.Be3]
ECO=B72
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3
BASIC=False
[Sicilian: dragon, Levenfish variation]
ECO=B71
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4
BASIC=False
[Sicilian: dragon, Levenfish; Flohr variation]
ECO=B71
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4 b8d7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nbd7
BASIC=False
[Sicilian: dragon, Yugoslav attack]
ECO=B75
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3
BASIC=False
[Sicilian: dragon, Yugoslav attack, 10.O-O-O]
ECO=B78
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O
BASIC=False
[Sicilian: dragon, Yugoslav attack, 12.h4]
ECO=B79
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 d8a5 c4b3 f8c8 h2h4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Qa5 11. Bb3 Rfc8 12. h4
BASIC=False
[Sicilian: dragon, Yugoslav attack, 7...O-O]
ECO=B76
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O
BASIC=False
[Sicilian: dragon, Yugoslav attack, 9...Bd7]
ECO=B77
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7
BASIC=False
[Sicilian: dragon, Yugoslav attack, 9.Bc4]
ECO=B77
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4
BASIC=False
[Sicilian: dragon, Yugoslav attack, Byrne variation]
ECO=B77
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 a7a5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 a5
BASIC=False
[Sicilian: dragon, Yugoslav attack, Rauser variation]
ECO=B76
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 e1c1
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. O-O-O
BASIC=False
[Sicilian: dragon, classical attack]
ECO=B72
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2
BASIC=False
[Sicilian: dragon, classical, 8.O-O]
ECO=B73
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O
BASIC=False
[Sicilian: dragon, classical, 9.Nb3]
ECO=B74
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 d4b3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. Nb3
BASIC=False
[Sicilian: dragon, classical, Alekhine variation]
ECO=B74
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 d4b3 a7a5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. Nb3 a5
BASIC=False
[Sicilian: dragon, classical, Amsterdam variation]
ECO=B72
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 d1d2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Qd2
BASIC=False
[Sicilian: dragon, classical, Bernard defence]
ECO=B74
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 d4b3 c8e6 f2f4 c6a5 f4f5 e6c4 e2d3 c4d3 c2d3 d6d5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Bd3 Bxd3 13. cxd3 d5
BASIC=False
[Sicilian: dragon, classical, Grigoriev variation]
ECO=B72
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 d1d2 e8g8 e1c1
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Qd2 O-O 9. O-O-O
BASIC=False
[Sicilian: dragon, classical, Nottingham variation]
ECO=B72
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 d4b3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Nb3
BASIC=False
[Sicilian: dragon, classical, Reti-Tartakower variation]
ECO=B74
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 d4b3 c8e6 f2f4 d8c8
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. Nb3 Be6 10. f4 Qc8
BASIC=False
[Sicilian: dragon, classical, Richter variation]
ECO=B73
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 d1d2
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. Qd2
BASIC=False
[Sicilian: dragon, classical, Spielmann variation]
ECO=B74
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 d4b3 c8e6 f2f4 c6a5 f4f5 e6c4 e2d3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Bd3
BASIC=False
[Sicilian: dragon, classical, Stockholm attack]
ECO=B74
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 d4b3 c8e6 f2f4 c6a5 f4f5 e6c4 b3a5 c4e2 d1e2 d8a5 g2g4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Nxa5 Bxe2 13. Qxe2 Qxa5 14. g4
BASIC=False
[Sicilian: dragon, classical, Zollner gambit]
ECO=B73
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 e1g1 e8g8 f2f4 d8b6 e4e5
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O-O O-O 9. f4 Qb6 10. e5
BASIC=False
[Sicilian: modern Scheveningen]
ECO=B83
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 b8c6
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Nc6
BASIC=False
[Sicilian: modern Scheveningen, main line]
ECO=B83
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 b8c6 e1g1 f8e7 c1e3 e8g8 f2f4
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Nc6 7. O-O Be7 8. Be3 O-O 9. f4
BASIC=False
[Sicilian: modern Scheveningen, main line with Nb3]
ECO=B83
A1H8=e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 f1e2 b8c6 e1g1 f8e7 c1e3 e8g8 f2f4 c8d7 d4b3
PGN=1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Nc6 7. O-O Be7 8. Be3 O-O 9. f4 Bd7 10. Nb3
BASIC=False
[Sicilian: wing gambit]
ECO=B20
A1H8=e2e4 c7c5 b2b4
PGN=1. e4 c5 2. b4
BASIC=False
[Sicilian: wing gambit deferred]
ECO=B50
A1H8=e2e4 c7c5 g1f3 d7d6 b2b4
PGN=1. e4 c5 2. Nf3 d6 3. b4
BASIC=False
[Sicilian: wing gambit, Carlsbad variation]
ECO=B20
A1H8=e2e4 c7c5 b2b4 c5b4 a2a3 b4a3
PGN=1. e4 c5 2. b4 cxb4 3. a3 bxa3
BASIC=False
[Sicilian: wing gambit, Marienbad variation]
ECO=B20
A1H8=e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 c1b2
PGN=1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Bb2
BASIC=False
[Sicilian: wing gambit, Marshall variation]
ECO=B20
A1H8=e2e4 c7c5 b2b4 c5b4 a2a3
PGN=1. e4 c5 2. b4 cxb4 3. a3
BASIC=False
[Sicilian: wing gambit, Santasiere variation]
ECO=B20
A1H8=e2e4 c7c5 b2b4 c5b4 c2c4
PGN=1. e4 c5 2. b4 cxb4 3. c4
BASIC=False
[St. George (Baker) defence]
ECO=B00
A1H8=e2e4 a7a6
PGN=1. e4 a6
BASIC=False
[St. George defence]
ECO=C00
A1H8=e2e4 e7e6 d2d4 a7a6
PGN=1. e4 e6 2. d4 a6
BASIC=False
[Tayler opening]
ECO=C44
A1H8=e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d4
BASIC=False
[Tennison (Lemberg, Zukertort) gambit]
ECO=A06
A1H8=g1f3 d7d5 e2e4
PGN=1. Nf3 d5 2. e4
BASIC=False
[Three knights game]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3
BASIC=False
[Three knights: Schlechter variation]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 f8b4 c3d5 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 Bb4 4. Nd5 Nf6
BASIC=False
[Three knights: Steinitz variation]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g7g6
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 g6
BASIC=False
[Three knights: Steinitz, Rosenthal variation]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 g7g6 d2d4 e5d4 c3d5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nd5
BASIC=False
[Three knights: Winawer defence (Gothic defence)]
ECO=C46
A1H8=e2e4 e7e5 g1f3 b8c6 b1c3 f7f5
PGN=1. e4 e5 2. Nf3 Nc6 3. Nc3 f5
BASIC=False
[Torre attack (Tartakower variation)]
ECO=D03
A1H8=d2d4 d7d5 g1f3 g8f6 c1g5
PGN=1. d4 d5 2. Nf3 Nf6 3. Bg5
BASIC=False
[Trompovsky attack (Ruth, Opovcensky opening)]
ECO=A45
A1H8=d2d4 g8f6 c1g5
PGN=1. d4 Nf6 2. Bg5
BASIC=False
[Two knights defence]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6
BASIC=False
[Two knights defence (Modern bishop's opening)]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3
BASIC=False
[Two knights defence, Keidanz variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e4e5 d7d5 c4b5 f6e4 f3d4 f8c5 d4c6 c5f2 e1f1 d8h4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 d5 6. Bb5 Ne4 7. Nxd4 Bc5 8. Nxc6 Bxf2+ 9. Kf1 Qh4
BASIC=False
[Two knights defence, Perreux variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 f3g5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. Ng5
BASIC=False
[Valencia opening]
ECO=A00
A1H8=d2d3 e7e5 b1d2
PGN=1. d3 e5 2. Nd2
BASIC=False
[Van't Kruijs opening]
ECO=A00
A1H8=e2e3
PGN=1. e3
BASIC=False
[Venezolana opening]
ECO=A00
A1H8=d2d3 c7c5 b1c3 b8c6 g2g3
PGN=1. d3 c5 2. Nc3 Nc6 3. g3
BASIC=False
[Vienna gambit]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4
PGN=1. e4 e5 2. Nc3 Nc6 3. f4
BASIC=False
[Vienna gambit, Steinitz variation]
ECO=C29
A1H8=e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 d2d3
PGN=1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. d3
BASIC=False
[Vienna gambit, Wurzburger trap]
ECO=C29
A1H8=e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d2d3 d8h4 g2g3 e4g3 g1f3 h4h5 c3d5
PGN=1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Qh4+ 6. g3 Nxg3 7. Nf3 Qh5 8. Nxd5
BASIC=False
[Vienna gambit: Bardeleben variation]
ECO=C29
A1H8=e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3 f7f5
PGN=1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5
BASIC=False
[Vienna gambit: Breyer variation]
ECO=C29
A1H8=e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 g1f3 f8e7
PGN=1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Be7
BASIC=False
[Vienna gambit: Heyde variation]
ECO=C29
A1H8=e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3 f7f5 d2d4
PGN=1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5 6. d4
BASIC=False
[Vienna gambit: Kaufmann variation]
ECO=C29
A1H8=e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 g1f3 c8g4 d1e2
PGN=1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Bg4 6. Qe2
BASIC=False
[Vienna gambit: Paulsen attack]
ECO=C29
A1H8=e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3
PGN=1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3
BASIC=False
[Vienna game]
ECO=C25
A1H8=e2e4 e7e5 b1c3
PGN=1. e4 e5 2. Nc3
BASIC=False
[Vienna game, Max Lange defence]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6
PGN=1. e4 e5 2. Nc3 Nc6
BASIC=False
[Vienna: Adams' gambit]
ECO=C27
A1H8=e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 b8c6 d2d4
PGN=1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. d4
BASIC=False
[Vienna: Alekhine variation]
ECO=C27
A1H8=e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 f8e7 g1f3 b8c6 f3e5
PGN=1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7 6. Nf3 Nc6 7. Nxe5
BASIC=False
[Vienna: Falkbeer variation]
ECO=C26
A1H8=e2e4 e7e5 b1c3 g8f6
PGN=1. e4 e5 2. Nc3 Nf6
BASIC=False
[Vienna: Fyfe gambit]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 d2d4
PGN=1. e4 e5 2. Nc3 Nc6 3. d4
BASIC=False
[Vienna: Hamppe-Allgaier gambit]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5
BASIC=False
[Vienna: Hamppe-Allgaier gambit, Alapin variation]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 d7d6
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5 d6
BASIC=False
[Vienna: Hamppe-Muzio gambit]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O
BASIC=False
[Vienna: Hamppe-Muzio, Dubois variation]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 c6e5 f3f4 d8f6
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O gxf3 7. Qxf3 Ne5 8. Qxf4 Qf6
BASIC=False
[Vienna: Mengarini variation]
ECO=C26
A1H8=e2e4 e7e5 b1c3 g8f6 a2a3
PGN=1. e4 e5 2. Nc3 Nf6 3. a3
BASIC=False
[Vienna: Paulsen variation]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 g2g3
PGN=1. e4 e5 2. Nc3 Nc6 3. g3
BASIC=False
[Vienna: Paulsen-Mieses variation]
ECO=C26
A1H8=e2e4 e7e5 b1c3 g8f6 g2g3
PGN=1. e4 e5 2. Nc3 Nf6 3. g3
BASIC=False
[Vienna: Pierce gambit]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 d2d4
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4
BASIC=False
[Vienna: Pierce gambit, Rushmere attack]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f1c4 g4f3 e1g1 d7d5 e4d5 c8g4 d5c6
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4 g4 6. Bc4 gxf3 7. O-O d5 8. exd5 Bg4 9. dxc6
BASIC=False
[Vienna: Steinitz gambit]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4
BASIC=False
[Vienna: Steinitz gambit, Fraser-Minckwitz variation]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 b7b6
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 b6
BASIC=False
[Vienna: Steinitz gambit, Zukertort defence]
ECO=C25
A1H8=e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 d7d5
PGN=1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 d5
BASIC=False
[Vienna: Zhuravlev countergambit]
ECO=C25
A1H8=e2e4 e7e5 b1c3 f8b4 d1g4 g8f6
PGN=1. e4 e5 2. Nc3 Bb4 3. Qg4 Nf6
BASIC=False
[Vienna: `Frankenstein-Dracula' variation]
ECO=C27
A1H8=e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 b8c6 c3b5 g7g6 h5f3 f7f5 f3d5 d8e7 b5c7 e8d8 c7a8 b7b6
PGN=1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6
BASIC=False
[Vulture defence]
ECO=A56
A1H8=d2d4 g8f6 c2c4 c7c5 d4d5 f6e4
PGN=1. d4 Nf6 2. c4 c5 3. d5 Ne4
BASIC=False
[Ware (Meadow Hay) opening]
ECO=A00
A1H8=a2a4
PGN=1. a4
BASIC=False
[Woozle defence]
ECO=A43
A1H8=d2d4 c7c5 d4d5 g8f6 b1c3 d8a5
PGN=1. d4 c5 2. d5 Nf6 3. Nc3 Qa5
BASIC=False
[de Bruycker defence]
ECO=B12
A1H8=e2e4 c7c6 d2d4 b8a6 b1c3 a6c7
PGN=1. e4 c6 2. d4 Na6 3. Nc3 Nc7
BASIC=False
[two knights defence]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5
BASIC=False
[two knights defence: Blackburne variation]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 c6b5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 cxb5
BASIC=False
[two knights defence: Bogolyubov variation]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3
BASIC=False
[two knights defence: Canal variation]
ECO=C56
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f6e4 f1e1 d7d5 b1c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 6. Re1 d5 7. Nc3
BASIC=False
[two knights defence: Colman variation]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 a8b8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Rb8
BASIC=False
[two knights defence: Fegatello attack]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 g5f7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7
BASIC=False
[two knights defence: Fegatello attack, Leonhardt variation]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 g5f7 e8f7 d1f3 f7e6 b1c3 c6b4 f3e4 c7c6 a2a3 b4a6 d2d4 a6c7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 7. Qf3+ Ke6 8. Nc3 Ncb4 9. Qe4 c6 10. a3 Na6 11. d4 Nac7
BASIC=False
[two knights defence: Fegatello attack, Polerio defence]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 g5f7 e8f7 d1f3 f7e6 b1c3 c6e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 7. Qf3+ Ke6 8. Nc3 Nce7
BASIC=False
[two knights defence: Fritz variation]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nd4
BASIC=False
[two knights defence: Fritz, Gruber variation]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6d4 c2c3 b7b5 c4f1 f6d5 g5e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nd4 6. c3 b5 7. Bf1 Nxd5 8. Ne4
BASIC=False
[two knights defence: Goering variation]
ECO=C59
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5f3 e5e4 f3e5 d8c7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Qc7
BASIC=False
[two knights defence: Kieseritsky variation]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3
BASIC=False
[two knights defence: Knorre variation]
ECO=C59
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5f3 e5e4 f3e5 f8d6 d2d4 d8c7 c1d2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Bd6 11. d4 Qc7 12. Bd2
BASIC=False
[two knights defence: Lolli attack]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 d2d4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4
BASIC=False
[two knights defence: Maroczy variation]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3 h7h6 g5f3 e5e4 d1e2 a5c4 d3c4 f8e7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. dxc4 Be7
BASIC=False
[two knights defence: Paoli variation]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 d8c7 b5d3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Qc7 9. Bd3
BASIC=False
[two knights defence: Pincus variation]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 d2d4 f8b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4 Bb4+
BASIC=False
[two knights defence: Steinitz variation]
ECO=C59
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5h3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nh3
BASIC=False
[two knights defence: Ulvestad variation]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 b7b5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5
BASIC=False
[two knights defence: Wilkes Barre (Traxler) variation]
ECO=C57
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5
BASIC=False
[two knights defence: Yankovich variation]
ECO=C58
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3 h7h6 g5f3 e5e4 d1e2 a5c4 d3c4 f8c5 f3d2
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. dxc4 Bc5 10. Nfd2
BASIC=False
[two knights defence: Yurdansky attack]
ECO=C56
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f6e4 f1e1 d7d5 c4d5 d8d5 b1c3 d5a5 c3e4 c8e6 c1g5 h7h6 g5h4 g7g5 e4f6 e8e7 b2b4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qa5 9. Nxe4 Be6 10. Bg5 h6 11. Bh4 g5 12. Nf6+ Ke7 13. b4
BASIC=False
[two knights: Max Lange attack]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5
BASIC=False
[two knights: Max Lange attack, Berger variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 d8d5 b1c3 d5f5 g2g4 f5g6 c3e4 c5b6 f2f4 e8c8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. g4 Qg6 12. Nce4 Bb6 13. f4 O-O-O
BASIC=False
[two knights: Max Lange attack, Krause variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 f6g4 c2c3
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 Ng4 7. c3
BASIC=False
[two knights: Max Lange attack, Loman defence]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 g7g6
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 g6
BASIC=False
[two knights: Max Lange attack, Marshall variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 d8d5 b1c3 d5f5 c3e4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. Nce4
BASIC=False
[two knights: Max Lange attack, Rubinstein variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 d8d5 b1c3 d5f5 c3e4 c5f8
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. Nce4 Bf8
BASIC=False
[two knights: Max Lange attack, Schlechter variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f6g7
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. fxg7
BASIC=False
[two knights: Max Lange attack, Steinitz variation]
ECO=C55
A1H8=e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 f6g4
PGN=1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 Ng4
BASIC=False
