Play chess opening positions by eco with the machine-Stockfish-level-1350-2500-or-with a friend on Lichess A00-A99

Encyclopaedia of Chess Openings Classification Code Index - play with computer on lichess

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A00: Uncommon Openings:

 1.g3 (Benko Opening),

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1.Nc3 (Sleipner Opening),

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 1.a3 (Anderssen's Opening),

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1.b4 (Sokolsky Opening),

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1.g4 (Grob's Attack),

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1.h3 (Basmanic Defence),

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 1.c3 (Saragossa Opening),

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1.d3 (Mieses Opening),

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 1.e3 (French Attack),

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 1.h4 (Desprez Opening),

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 1.a4 (Ware Opening),

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1.Nh3 (Amar Opening),

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 1.Na3 (Durkin's Attack),

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1.f3 (Gedult's Opening)

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A01: Nimzowitsch-Larsen Attack: 1.b3

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A02: Bird's Opening: 1.f4

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A03: Bird's Opening: 1.f4 d5

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A04: Reti Opening: 1.Nf3

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A05: Reti Opening: 1.Nf3 Nf6

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A06: Reti Opening: 1.Nf3 d5

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A07: King's Indian Attack: 1.Nf3 d5 2.g3

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A08: King's Indian Attack: 1.Nf3 d5 2.g3 c5 3.Bg2

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A09: Reti Opening: 1.Nf3 d5 2.c4

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A10: English: 1.c4

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A11: English, Anglo-Slav System: 1.c4 c6

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A12: English with b3: 1.c4 c6 2.Nf3 d5 3.b3

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A13: English: 1.c4 e6

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A14: English: 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O

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A15: English: 1.c4 Nf6

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A16: English: 1.c4 Nf6 2.Nc3

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A17: English: 1.c4 Nf6 2.Nc3 e6

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A18: English, Mikenas-Carls: 1.c4 Nf6 2.Nc3 e6 3.e4

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A19: English, Mikenas-Carls, Sicilian Variation: 1.c4 Nf6 2.Nc3 e6 3.e4 c5

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A20: English: 1.c4 e5

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A21: English: 1.c4 e5 2.Nc3

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A22: English: 1.c4 e5 2.Nc3 Nf6

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A23: English, Bremen System, Keres Variation: 1.c4 e5 2.Nc3 Nf6 3.g3 c6

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A24: English, Bremen System with ...g6: 1.c4 e5 2.Nc3 Nf6 3.g3 g6

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A25: English: 1.c4 e5 2.Nc3 Nc6

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A26: English: 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6

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A27: English, Three Knights System: 1.c4 e5 2.Nc3 Nc6 3.Nf3

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A28: English: 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6

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A29: English, Four Knights, Kingside Fianchetto: 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 g3

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A30: English, Symmetrical: 1.c4 c5

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A31: English, Symmetrical, Benoni Formation: 1.c4 c5 2.Nf3 Nf6 3.d4

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A32: English, Symmetrical Variation: 1.c4 c5 2.Nf3 Nf6 3.d4 c/d4 4.N/d4 e6

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A33: English, Symmetrical: 1.c4 c5 2.Nf3 Nf6 3.d4 c/d4 4.N/d4 e6 5.Nc3 Nc6

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A34: English, Symmetrical: 1.c4 c5 2.Nc3

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A35: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6

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A36: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7

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A37: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3

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A38: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6

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A39: English, Symmetrical: 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4

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A40: Unusual Black responses to 1.d4:

 1...e5 (Englund Gambit),

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 1...b5 (Polish Defence),

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 1...Nc6 (Nimzowitsch Defence),

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 1...g6 (Modern Defence without 2.e4),

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1...e6 (French Indian Defence).

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A41: Tartakower System: 1.d4 d6

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A42: Tartakower System with 2.c4: 1.d4 d6 2.c4

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A43: Various Benonis: 1.d4 c5

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A44: Old Benoni: 1.d4 c5 2.d5 e5

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A44: Semi-Benoni: 1.d4 c5 2.d5 e5 3.e4 d6

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A45: Unusual Indian Openings: 1.d4 Nf6

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A45: Trompowsky Attack: 1.d4 Nf6 2.Bg5

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A46: Unusual Indian Openings with 2.Nf3: 1.d4 Nf6 2.Nf3

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A47: Unusual Indian Openings with 2.Nf3: 1.d4 Nf6 2.Nf3 b6

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A48: Torre Attack with 2...e6: 1.d4 Nf6 2.Nf3 e6 3.Bg5

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A48: Torre Attack with 2...g6: 1.d4 Nf6 2.Nf3 g6 3.Bg5

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A48: London System: 1.d4 Nf6 2.Nf3 e6 3.Bf4

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A49: Fianchetto Variation: 1.d4 Nf6 2.Nf3 e6 3.g3

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A50: Black Knights' Tango: 1.d4 Nf6 2.c4 Nc6

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A51: Budapest Gambit Declined and Unusual Lines: 1.d4 Nf6 2.c4 e5

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A52: Budapest Gambit Main Lines: 1.d4 Nf6 2.c4 e5 3.d/e5 Ng4

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A53: Old Indian Defence: 1.d4 Nf6 2.c4 d6

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A54: Old Indian Defence main lines: 1.d4 Nf6 2.c4 d6 3.Nc3 e5

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A55: Old Indian Defence main lines: 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3

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A56: Czech Benoni: 1.d4 Nf6 2.c4 c5 3.d5

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A57: Benko/Volga Gambit sidelines: 1.d4 Nf6 2.c4 c5 3.d5 b5

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A58: Benko/Volga Gambit Accepted: 1.d4 Nf6 2.c4 c5 3.d5 b5 4.c/b5

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A59: Benko/Volga Gambit Accepted (White castles by hand): 1.d4 Nf6 2.c4 c5 3.d5 b5 4.c/b5 a6

5.b/a6 B/a6 6.Nc3 d6 7.e4

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A60: Modern Benoni and early divergences: 1.d4 Nf6 2.c4 c5 3.d5 e6

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A61: Modern Benoni without early e4: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

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A62: Modern Benoni, Fianchetto Variation without early ...Nbd7: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5

5.c/d5 d6 6.Nf3 g6 7.g3

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A63: Modern Benoni, Fianchetto Variation sidelines: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O

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A64: Modern Benoni, Fianchetto Variation main line: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O Re8 10.Nd2 Nbd7

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A65: Modern Benoni, sidelines with early e4: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6 6.e4

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A66: Modern Benoni, Mikenas Attack: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6 6.e4 g6 7.f4

Bg7 8.e5

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A67: Modern Benoni, Taimanov Variation: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6 6.e4 g6 7.f4

Bg7 8.Bb5+

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A68: Modern Benoni, Four Pawns Attack without 9...Re8: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5

d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O 9.Bd3

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A69: Modern Benoni, Four Pawns Attack with 9...Re8: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

6.e4 g6 7.f4 Bg7 8.Nf3 O-O 9.Bd3 Re8

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A70: Modern Benoni, 7.Nf3: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6 6.e4 g6 7.Nf3

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A71: Modern Benoni, 7.Nf3 Bg7 8.Bg5 without Be2: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

6.e4 g6 7.Nf3 Bg7 8.Bg5

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A72: Modern Benoni, Classical Variation with Bg5: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.Bg5

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A73: Modern Benoni, Classical Variation and unusual Black 9th moves: 1.d4 Nf6 2.c4 c5 3.d5 e6

4.Nc3 e/d5 5.c/d5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O

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A74: Modern Benoni, Classical Variation with 9...a6: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6

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A75: Modern Benoni, Classical Variation main line: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5 d6

6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 10.a4 Bg4

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A76: Modern Benoni, Classical Variation with 9...Re8 10.Qc2: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5

5.c/d5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Qc2

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A77: Modern Benoni, Classical Variation with 9...Re8 10.Nd2: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5

5.c/d5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2

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A78: Modern Benoni, Classical Variation with 10...Na6: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5 5.c/d5

d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6

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A79: Modern Benoni, Classical Variation with 10...Na6 11.f3: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 e/d5

5.c/d5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 11.f3

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A80: Dutch Defence and unusual White second moves: 1.d4 f5

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A81: Dutch Defence with 2.g3: 1.d4 f5 2.g3

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A82: Dutch Defence, Staunton Gambit: 1.d4 f5 2.e4

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A83: Dutch Defence, Staunton Gambit with 3.Nc3 Nf6 4.Bg5: 1.d4 f5 2.e4 f/e4 3.Nc3 Nf6 4.Bg5

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A84: Dutch Defence, 2.c4: 1.d4 f5 2.c4

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A85: Dutch Defence, 2.c4 Nf6 3.Nc3: 1.d4 f5 2.c4 Nf6 3.Nc3

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A86: Dutch Defence, Leningrad Variation sidelines: 1.d4 f5 2.c4 Nf6 3.g3

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A87: Dutch Defence, Leningrad Variation with 5.Nf3: 1 d4 f5 2 c4 Nf6 3 g3 g6 4 Bg2 Bg7 5 Nf3

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A88: Dutch Defence, Leningrad Variation main line 7...c6:  1 d4 f5 2 c4 Nf6 3 g3 g6 4 Bg2 Bg7 5 Nf3 O-O 6 O-O d6 7 Nc3 c6

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A89: Dutch Defence, Leningrad Variation main line 7...Nc6: 1 d4 f5 2 c4 Nf6 3 g3 g6 4 Bg2 Bg7 5 Nf3 O-O 6 O-O d6 7 Nc3 Nc6

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A90: Dutch Defence sidelines and Stonewall: 1.d4 f5 2.c4 Nf6 3.g3 e6

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A91: Dutch Defence, Classical Variation sidelines: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7

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A92: Dutch Defence, Classical Stonewall with ...Be7 and early deviations: 1.d4 f5 2.c4 Nf6 3.g3 e6

4.Bg2 Be7 5.Nf3

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A93: Dutch Defence, Classical Stonewall with 7.b3: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 d5 6. O-O

O-O 7.b3

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A94: Dutch Defence, Classical Stonewall with 7.b3 c6 8.Ba3: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7

5.Nf3 d5 6.O-O O-O 7.b3 c6 8.Ba3

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A95: Dutch Defence, Classical Stonewall with 7.Nc3 c6: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 d5

6.O-O O-O 7.Nc3 c6

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A96: Dutch Defence, Ilyin-Genevsky Variation: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O

d6

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A97: Dutch Defence, Ilyin-Genevsky Variation: 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O

d6 7.Nc3 Qe8

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A98: Dutch Defence, Ilyin-Genevsky Variation with 8.Qc2: 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

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A99: Dutch Defence, Ilyin-Genevsky Variation with 8.b3: 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

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