Play chess opening positions by eco with the machine-Stockfish-level-1350-2500-or-with a friend on Lichess D00-D99

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

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D00: 1.d4 d5 unusual lines: 1.d4 d5

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D01: Veresov Opening: 1.d4 d5 2.Nc3 Nf6 3.Bg5

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D02: 1.d4 d5 2.Nf3 sidelines: 1.d4 d5 2.Nf3 (2...f5--A80)

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D03: Torre System: 1.d4 d5 2.Nf3 Nf6 3.Bg5

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D04: Colle System: 1.d4 d5 2.Nf3 Nf6 3.e3

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D05: Colle System with ...e6: 1.d4 d5 2.Nf3 Nf6 3.e3 e6

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D06: Queen's Gambit, Marshall Defence: 1.d4 d5 2.c4 Nf6 3.c/d5

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D06: Queen's Gambit, Baltic Defence: 1.d4 d5 2.c4 Bf5

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D07: Queen's Gambit, Chigorin Defence: 1.d4 d5 2.c4 Nc6

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D08: Queen's Gambit, Albin Countergambit sidelines: 1.d4 d5 2.c4 e5

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D09: Queen's Gambit, Albin Countergambit main line: 1.d4 d5 2.c4 e5 3.d/e5 d4 4.Nf3 Nc6 5.g3

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D10: Slav Defence sidelines: 1.d4 d5 2.c4 c6

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D10: Slav Defence, E/change Variation: 1.d4 d5 2.c4 c6 3.c/d5

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D10: Slav Defence, Winawer Countergambit: 1.d4 d5 2.c4 c6 3.Nc3 e5

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D11: Slav Defence, 3.Nf3 sidelines: 1.d4 d5 2.c4 c6 3.Nf3

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D11: Slav Defence, 3.Nf3 Nf6 4.e3 Bg4: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4

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D12: Slav Defence, 4.e3 Bf5: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5

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D13: Slav Defence, Classical E/change Variation without ...Bf5: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.c/d5

c/d5

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D14: Slav Defence, Classical E/change Variation main line: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.c/d5 c/d5

5.Nc3 Nc6 6.Bf4 Bf5

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D15: Slav Defence 4.Nc3 a6: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6

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D15: Slav Defence 4.Nc3 d/c4 gambit lines: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4

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D16: Slav Defence, Smyslov System: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4 5.a4 Na6

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D16: Slav Defence, Bronstein System: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4 5.a4 Bg4

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D17: Slav Defence, 5...Bf5 sidelines: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4 5.a4 Bf5

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D17: Slav Defence, Carlsbad Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4 5.a4 Bf5 6.Ne5 Nbd7

7.N/c4 Qc7

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D17: Slav Defence, Wiesbaden Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4 5.a4 Bf5 6.Ne5 e6

7.f3

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D18: Slav Defence, Euwe Variation without Qe2: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4 5.a4 Bf5 6.e3

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D19: Slav Defence, Euwe Variation main line: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 d/c4 5.a4 Bf5 6.e3 e6

7.B/c4 Bb4 8.O-O O-O 9.Qe2

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D20: Queen's Gambit Accepted with 3.e3: 1.d4 d5 2.c4 d/c4 3.e3

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D20: Queen's Gambit Accepted with 3.e4: 1.d4 d5 2.c4 d/c4 3.e4

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D21: Queen's Gambit Accepted, 3.Nf3 sidelines: 1.d4 d5 2.c4 d/c4 3.Nf3

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D22: Queen's Gambit Accepted, 3.Nf3 a6 4.e3: 1.d4 d5 2.c4 d/c4 3.Nf3 a6 4.e3

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D23: Queen's Gambit Accepted, 3.Nf3 Nf6 sidelines: 1.d4 d5 2.c4 d/c4 3.Nf3 Nf6

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D24: Queen's Gambit Accepted, 3.Nf3 Nf6 4.Nc3: 1.d4 d5 2.c4 d/c4 3.Nf3 Nf6 4.Nc3

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D25: Queen's Gambit Accepted, 4.e3 sidelines: 1.d4 d5 2.c4 d/c4 3.Nf3 Nf6 4.e3

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D26: Queen's Gambit Accepted, 4.e3 e6 5.B/c4 c5 sidelines: 1.d4 d5 2.c4 d/c4 3.Nf3 Nf6 4.e3 4.e6

5.B/c4 c5

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D27: Queen's Gambit Accepted, Classical main line with 7.e4!?: 1.d4 d5 2.c4 d/c4 3.Nf3 Nf6 4.e3 4.e6

5.B/c4 c5 6.O-O a6 7.e4

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D27: Queen's Gambit Accepted, Classical main line with 7.a4: 1.d4 d5 2.c4 d/c4 3.Nf3 Nf6 4.e3 4.e6

5.B/c4 c5 6.O-O a6 7.a4

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D28: Queen's Gambit Accepted, Classical main line with 7.Qe2 and early ...Nc6: 1.d4 d5 2.c4 d/c4

3.Nf3 Nf6 4.e3 4.e6 5.B/c4 c5 6.O-O a6 7.Qe2 Nc6

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D29: Queen's Gambit Accepted, Classical main line with 7.Qe2 and early ...Nbd7: 1.d4 d5 2.c4 d/c4

3.Nf3 Nf6 4.e3 4.e6 5.B/c4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 9.Rd1 Nbd7

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D30: Queen's Gambit Declined without 3.Nc3: 1.d4 d5 2.c4 e6

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D31: Queen's Gambit Declined, Alatortsev Variation: 1.d4 d5 2.c4 e6 3.Nc3 Be7

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D31: Semi-Slav without ...Nf6: 1.d4 d5 2.c4 e6 3.Nc3 c6

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D32: Tarrasch Defence sidelines: 1.d4 d5 2.c4 e6 3.Nc3 c5

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D33: Tarrasch Defence, 6.g3 sidelines: 1 d4 d5 2 c4 e6 3 Nc3 c5 4 c/d5 e/d5 5 Nf3 Nc6 6 g3

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D34: Tarrasch Defence, 6.g3 Nf6 7.Bg2 Be7: 1 d4 d5 2 c4 e6 3 Nc3 c5 4 c/d5 e/d5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7

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D35: Queen's Gambit Declined, early deviations: 1.d4 d5 2.c4 e6 3.Nc3 Nf6

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D35: Queen's Gambit Declined, E/change Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.c/d5 e/d5

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D36: Queen's Gambit Declined, E/change Variation main line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.c/d5 e/d5

5.Bg5 Be7 6.Qc2

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D37: Queen's Gambit Declined with 5.Bf4: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 4.Be7 5.Bf4

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D38: Queen's Gambit Declined, Ragozin Defence: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 4.Bb4

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D39: Queen's Gambit Declined, Ragozin Defence with 5.Bg5 d/c4: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3

4.Bb4 5.Bg5 d/c4

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D40: Queen's Gambit Declined, Semi-Tarrasch Defence: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 4.c5

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D41: Queen's Gambit Declined, Semi-Tarrasch Defence with 5.c/d5: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3

4.c5 5.c/d5 N/d5

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D42: Queen's Gambit Declined, Semi-Tarrasch Defence main line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3

4.c5 5.c/d5 N/d5 6.e3 Nc6 7.Bd3

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D43: Semi-Slav, 5.Bg5 h6: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 h6

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D44: Semi-Slav, Botvinnik Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 d/c4 6.e4 b5 7.e5 h6

8.Bh4 g5 9.N/g5 h/g5 10.B/g5

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D45: Semi-Slav, 5.e3: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3

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D46: Semi-Slav, 5.e3 Nbd7 6.Bd3 where Black avoids the Meran: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6

5.e3 Nbd7 6.Bd3

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D47: Semi-Slav, Meran System sidelines: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 d/c4

7.B/c4

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D48: Semi-Slav, Meran System without early ...c5: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7

6.Bd3 d/c4 7.B/c4 b5 8.Bd3 a6 9.O-O

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D49: Semi-Slav, Meran System main line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 d/c4

7.B/c4 b5 8.Bd3 a6 9.e4 c5 10.e5 c/d4 11.N/b5 a/b5 12.e/f6 g/f6

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D50: Queen's Gambit Declined, Dutch-Peruvian Gambit: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5

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D50: Queen's Gambit Declined, Orthodo/ Variation sidelines: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5

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D51: Queen's Gambit Declined, 4.Bg5 Nbd7 sidelines: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7

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D52: Queen's Gambit Declined, Cambridge Springs Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7

5.e3 c6 6.Nf3 Qa5

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D53: Queen's Gambit Declined, Orthodo/ Variation early deviations: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5

Be7

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D54: Queen's Gambit Declined, Orthodo/ Variation without Nf3: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7

5.e3 O-O 6.Rc1

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D55: Queen's Gambit Declined, Orthodo/ Variation without ...h6: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5

Be7 5.e3 O-O 6.Nf3

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D56: Queen's Gambit Declined, Lasker Variation sidelines: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3

O-O 6.Nf3 h6 7.Bh4 Ne4

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D57: Queen's Gambit Declined, Lasker Variation main line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3

O-O 6.Nf3 h6 7.Bh4 Ne4 8.B/e7 Q/e7 9.c/d5 e/d5

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D58: Queen's Gambit Declined, Tartakower Defence sidelines: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7

5.e3 O-O 6.Nf3 h6 7.Bh4 b6

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D59: Queen's Gambit Declined, Tartakower Defence main line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7

5.e3 O-O 6.Nf3 h6 7.Bh4 b6 8.c/d5 N/d5

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D60: Queen's Gambit Declined, Classical Variation with unusual White seventh moves: 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 O-O 6 Nf3 Nbd7

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D61: Queen's Gambit Declined, Classical Variation with 7.Qc2: 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 O-O 6 Nf3 Nbd7 7 Qc2

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D62: Queen's Gambit Declined, Classical Variation with 7.Qc2 c5 8.c/d5: 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 O-O 6 Nf3 Nbd7 7 Qc2 c5 8 c/d5

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D63: Queen's Gambit Declined, Classical Variation with 7.Rc1: 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 O-O 6 Nf3 Nbd7 7 Rc1

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D64: Queen's Gambit Declined, Classical Variation with 7.Rc1 c6 8.Qc2: 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 O-O 6 Nf3 Nbd7 7 Rc1 c6 8 Qc2

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D65: Queen's Gambit Declined, Classical Variation with 7.Rc1 c6 8.Qc2 a6 9.c/d5: 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 c/d5

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D66: Queen's Gambit Declined, Classical Variation main line: 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 O-O 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3

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D67: Queen's Gambit Declined, 9...Nd5: 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 O-O 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 d/c4 9 B/c4 Nd5

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D68: Queen's Gambit Declined, Capablanca's Freeing Maneuver: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 d/c4 9.B/c4 Nd5 10.B/e7 Q/e7 11.O-O N/c3 12.R/c3 e5

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D69: Queen's Gambit Declined, Capablanca's Freeing Maneuver main line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6

4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 d/c4 9.B/c4 Nd5 10.B/e7 Q/e7 11.O-O N/c3 12.R/c3 e5 13.d/e5

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D70: Grünfeld Defence, unusual White third moves met by 3...d5: 1.d4 Nf6 2.c4 g6 (3.Nc3--E20-E99)

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D71: Grünfeld Defence, Fianchetto Variation sidelines: 1.d4 Nf6 2.c4 g6 3.g3 d5

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D72: Grünfeld Defence, Fianchetto Variation without Nf3: 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.c/d5

N/d5 6.e4

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D73: Grünfeld Defence, Fianchetto Variation with 5.Nf3 sidelines: 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7

5.Nf3

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D74: Grünfeld Defence, Fianchetto Variation with 5.Nf3 O-O main line: 1.d4 Nf6 2.c4 g6 3.g3 d5

4.Bg2 Bg7 5.Nf3 O-O 6.c/d5 N/d5 7.O-O

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D75: Grünfeld Defence, Fianchetto Variation with 5.Nf3 O-O 6.c/d5 N/d5 7.Nc3 c5: 1.d4 Nf6 2.c4 g6

3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.c/d5 N/d5 7.Nc3 c5

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D76: Grünfeld Defence, Fianchetto Variation main line with 7.O-O Nb6: 1.d4 Nf6 2.c4 g6 3.g3 d5

4.Bg2 Bg7 5.Nf3 O-O 6.c/d5 N/d5 7.O-O Nb6

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D77: Grünfeld Defence, Fianchetto Variation 6.O-O without 6...c6: 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2

Bg7 5.Nf3 O-O 6.O-O

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D78: Grünfeld Defence, Fianchetto Variation with 6.O-O c6: 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7

5.Nf3 O-O 6.O-O c6

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D79: Grünfeld Defence, Symmetrical Variation: 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O

c6 7.c/d5 c/d5

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D80: Grünfeld Defence, unusual White fourth moves: 1.d4 Nf6 2.c4 g6 3.Nc3 d5

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D80: Grünfeld Defence, 4.Bg5: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5

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D81: Grünfeld Defence, Accelerated Russian System: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3

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D82: Grünfeld Defence, 4.Bf4: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4

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D83: Grünfeld Defence, 4.Bf4 Bg7 5.e3 O-O: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O

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D84: Grünfeld Defence, 4.Bf4 Bg7 5.e3 O-O 6.c/d5: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O

6.c/d5

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D85: Grünfeld Defence, Nadanian Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.c/d5 N/d5 5.Na4

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D85: Grünfeld Defence, E/change Variation with 7.Nf3: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.c/d5 N/d5 5.e4

N/c3 6.b/c3 Bg7 7.Nf3

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D86: Grünfeld Defence, Classical E/change Variation sidelines: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.c/d5

N/d5 5.e4 N/c3 6.b/c3 Bg7 7.Bc4

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D87: Grünfeld Defence, Classical E/change Variation without ...c/d4: 1.d4 Nf6 2.c4 g6 3.Nc3 d5

4.c/d5 N/d5 5.e4 N/c3 6.b/c3 Bg7 7.Bc4 c5 8.Ne2 O-O 9.O-O

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D88: Grünfeld Defence, Classical E/change Variation with 10.Be3 c/d4 11.c/d4: 1.d4 Nf6 2.c4 g6

3.Nc3 d5 4.c/d5 N/d5 5.e4 N/c3 6.b/c3 Bg7 7.Bc4 c5 8.Ne2 O-O 9.O-O

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D89: Grünfeld Defence, Classical E/change Variation main line: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.c/d5

N/d5 5.e4 N/c3 6.b/c3 Bg7 7.Bc4 c5 8.Ne2 O-O 9.O-O Nc6 10.Be3 c/d4 11.c/d4 Bg4 12.f3 Na5

13.Bd3

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D90: Grünfeld Defence, 4.Nf3 Bg7 sidelines: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7

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D91: Grünfeld Defence, 4.Nf3 Bg7 5.Bg5: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5

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D92: Grünfeld Defence, 4.Nf3 Bg7 5.Bf4 sidelines: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4

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D93: Grünfeld Defence, 4.Nf3 Bg7 5.Bf4 main line: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 O-O

6.e3

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D94: Grünfeld Defence, Closed Variation sidelines: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3

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D95: Grünfeld Defence, Closed Variation main line: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O

6.Qb3

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D96: Grünfeld Defence, Russian System sidelines: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3

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D97: Grünfeld Defence, Russian System main line without 7...Bg4: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3

Bg7 5.Qb3 d/c4 6.Q/c4 O-O 7.e4

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D98: Grünfeld Defence, Russian System, Smyslov Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7

5.Qb3 d/c4 6.Q/c4 O-O 7.e4 Bg4 8.Be3 Nfd7

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D99: Grünfeld Defence, Russian System main line: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 d/c4

6.Q/c4 O-O 7.e4 Bg4 8.Be3 Nfd7 9.Qb3

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