Play chess opening positions by eco with the machine-Stockfish-level-1350-2500-or-with a friend on Lichess E00-E99

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

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E00: Various Indian Defences: 1.d4 Nf6

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E01: Catalan Opening, early deviations: 1.d4 Nf6 2.c4 e6 3.g3 d5

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E02: Open Catalan with 5.Qa4+: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 d/c4 5.Qa4+

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E03: Open Catalan, 5.Qa4+ Nbd7 6.Q/c4: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 d/c4 5.Qa4+ Nbd7 6.Q/c4

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E04: Open Catalan, 5.Nf3: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 d/c4 5.Nf3

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E05: Open Catalan, 5.Nf3 main line: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 d/c4 5.Nf3 Be7 6.O-O O-O

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E06: Closed Catalan sidelines: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 Be7

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E07: Closed Catalan, 5.Bg2 O-O 6.O-O Nbd7: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 Be7 5.Bg2 O-O 6.O-O

Nbd7

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E08: Closed Catalan, 7.Qc2: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 Be7 5.Bg2 O-O 6.O-O Nbd7 7.Qc2

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E09: Closed Catalan, main line: 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Nf3 Be7 5.Bg2 O-O 6.O-O Nbd7 7.Qc2 c6

8.Nbd2

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E10: Blumenfeld Gambit: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nf3 b5

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E11: Bogo-Indian Defence: 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+

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E12: Queen's Indian Defence: 1.d4 Nf6 2.c4 e6 3.Nf3 b6

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E13: Queen's Indian Defence, 4.Nc3, Main line: 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3

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E14: Queen's Indian Defence, 4.e3 : 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3

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E15: Queen's Indian Defence, 4.g3 : 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3

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E16: Queen's Indian Defence, Capablanca Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+

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E17: Queen's Indian Defence, 5.Bg2 Be7: 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7

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E18: Queen's Indian Defence, 5.Bg2 Be7: 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O

7.Nc3

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E19 Queen's Indian, Old Main line, 9.Q/c3: 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O OO

7.Nc3 Ne4 8.Qc2 N/c3 9.Q/c3

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E20 Nimzo-Indian Defence: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4

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E21 Nimzo-Indian, Three knights variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3

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E22 Nimzo-Indian, Spielmann Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3

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E23 Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.d/c5 Nc6

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E24 Nimzo-Indian, Sämisch Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3

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E25 Nimzo-Indian, Sämisch Variation, Keres Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 B/c3+

5.b/c3 c5 6.f3 d5 7.c/d5

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E26 Nimzo-Indian, Sämisch Variation, 4.a3 B/c3+ 5.b/c3 c5 6.e3: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3

B/c3+ 5.b/c3 c5 6.e3

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E27 Nimzo-Indian, Sämisch Variation, 5...0-0: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 B/c3+ 5.b/c3 O-O

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E28 Nimzo-Indian, Sämisch Variation, 6.e3: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 B/c3+ 5.b/c3 O-O 6.e3

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E29 Nimzo-Indian, Sämisch Variation, Main line: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 B/c3+ 5.b/c3 O-O

6.e3 c5 7.Bd3 Nc6

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E30 Nimzo-Indian, Leningrad Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5

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E31 Nimzo-Indian, Leningrad Variation, main line: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5

6.d5 d6

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E32 Nimzo-Indian, Classical Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2

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E33 Nimzo-Indian, Classical Variation, 4...Nc6: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6

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E34 Nimzo-Indian, Classical, Noa Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5

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E35 Nimzo-Indian, Classical, Noa Variation, 5.c/d5 e/d5: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5

5.c/d5 e/d5

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E36 Nimzo-Indian, Classical, Noa Variation, 5.a3: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3

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E37 Nimzo-Indian, Classical, Noa Variation, Main line, 7.Qc2: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5

5.a3 B/c3+ 6.Q/c3 Ne4

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E38 Nimzo-Indian, Classical, 4...c5: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5

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E39 Nimzo-Indian, Classical, Pirc Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.d/c5 O-O

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E40 Nimzo-Indian, 4.e3: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

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E41 Nimzo-Indian, 4.e3 c5: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5

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E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein): 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2

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E43 Nimzo-Indian, Fischer Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6

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E44 Nimzo-Indian, Fischer Variation, 5.Ne2: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2

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E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6

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E46 Nimzo-Indian, 4.e3 O-O: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O

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E47 Nimzo-Indian, 4.e3 O-O, 5.Bd3: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3

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E48 Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5

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E49 Nimzo-Indian, 4.e3, Botvinnik System: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3

B/c3+ 7.b/c3

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E50 Nimzo-Indian, 4.e3 O-O, 5.Nf3, without ...d5: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3

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E51 Nimzo-Indian, 4.e3 O-O, 5.Nf3 d5: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5

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E52 Nimzo-Indian, 4.e3, Main line with ...b6: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 b6

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E53 Nimzo-Indian, 4.e3, Main line with ...c5: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5

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E54 Nimzo-Indian, 4.e3, Gligoric System with 7...dc: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5

6.Bd3 c5 7.O-O d/c4 8.B/c4

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E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O

5.Nf3 d5 6.Bd3 c5 7.O-O d/c4 8.B/c4 Nbd7

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E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3

c5 7.O-O Nc6

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E57 Nimzo-Indian, 4.e3, Main line with 8...d/c4 and 9...B/c4 c/d4: 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 d/c4 9.B/c4 c/d4

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E58 Nimzo-Indian, 4.e3, Main line with 8...B/c3: 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 B/c3 9.b/c3

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E59 Nimzo-Indian, 4.e3, Main line: 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 B/c3 9.b/c3 d/c4 10.B/c4

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E60 King's Indian Defence: 1.d4 Nf6 2.c4 g6

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E61 King's Indian Defence, 3.Nc3: 1.d4 Nf6 2.c4 g6 3.Nc3

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E62 King's Indian, Fianchetto Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3

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E63 King's Indian, Fianchetto, Panno Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2

Nc6 7.O-O a6

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E64 King's Indian, Fianchetto, Yugoslav System: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O

6.Bg2 c5

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E65 King's Indian, Yugoslav, 7.O-O: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5 7.O-O

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E66 King's Indian, Fianchetto, Yugoslav Panno: 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

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E67 King's Indian, Fianchetto with ...Nd7: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7

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E68 King's Indian, Fianchetto, Classical Variation, 8.e4: 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

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E69 King's Indian, Fianchetto, Classical Main line: 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

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E70 King's Indian, 4.e4: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4

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E71 King's Indian, Makogonov System (5.h3): 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3

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E72 King's Indian with e4 & g3: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3

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E73 King's Indian, 5.Be2: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2

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E74 King's Indian, Averbakh, 6...c5: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5

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E75 King's Indian, Averbakh, Main line: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 7.d5

e6

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E76 King's Indian Defence, Four Pawns Attack: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4

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E77 King's Indian, Four Pawns Attack, with Be2: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2

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E78 King's Indian, Four Pawns Attack, with Be2 and Nf3: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O  6.Be2 c5 7.Nf3

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E79 King's Indian, Four Pawns Attack, Main line: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2

c5 7.Nf3 c/d4 8.N/d4 Nc6 9.Be3

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E80 King's Indian, Sämisch Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3

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E81 King's Indian, Sämisch, 5...O-O: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O

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E82 King's Indian, Sämisch, double Fianchetto Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 b6

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E83 King's Indian, Sämisch, 6...Nc6: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6

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E84 King's Indian, Sämisch, Panno Main line: 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

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E85 King's Indian, Sämisch, Orthodo/ Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3

e5

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E86 King's Indian, Sämisch, Orthodo/, 7.Nge2 c6: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O

6.Be3 e5 7.Nge2 c6

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E87 King's Indian, Sämisch, Orthodo/, 7.d5: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5

7.d5

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E88 King's Indian, Sämisch, Orthodo/, 7.d5 c6: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3

e5 7.d5 c6

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E89 King's Indian, Sämisch, Orthodo/ Main line: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3

e5 7.d5 c6 8.Nge2

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E90 King's Indian, 5.Nf3: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3

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E91 King's Indian, 6.Be2: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2

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E92 King's Indian, Classical Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5

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E93 King's Indian, Petrosian System, Main line: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2

e5 7.d5 Nbd7

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E94 King's Indian, Orthodo/ Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O

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E95 King's Indian, Orthodo/, 7...Nbd7, 8.Re1: 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

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E96 King's Indian, Orthodo/, 7...Nbd7, Main line: 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

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E97 King's Indian, Orthodo/, Aronin-Taimanov Variation (Yugoslav Attack / Mar del Plata Variation):

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6

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E98 King's Indian, Orthodo/, Aronin-Taimanov, 9.Ne1: 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

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E99 King's Indian, Orthodo/, Aronin-Taimanov, Main: 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

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