| ECO |
Opening Name |
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| A50 |
Queen's pawn game |
A50 |
1.d4-Nf6; 2.c4 |
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1) Kevitz-Trajkovich defense |
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2...Nc6 |
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2) Queen's Indian accelerated |
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2...b6 |
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3) Rest in A50 |
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Rest |
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| A51 |
Budapest defense |
A51 |
1.d4-Nf6; 2.c4-e5 |
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declined |
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1) Fajarowicz variation |
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3.dxe5-Ne4 |
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2) Rest in A51 |
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Rest |
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| A52 |
Budapest defense |
A52 |
1.d4-Nf6; 2.c4-e5; |
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3.dxe5-Ng4 |
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1) Adler variation |
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4.Nf3 |
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2) Rubinstein variation |
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4.Bf4 |
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3) Alekhine variation |
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4.e4 |
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4) Rest in A52 |
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Rest |
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| A53 |
Old Indian defense |
A53 |
1.d4-Nf6; 2.c4-d6 |
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1) Janowski variation |
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3.Nc3-Bf5 |
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2) Rest in A53 |
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Rest |
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| A54 |
Old Indian: Ukrainian |
A54 |
1.d4-Nf6; 2.c4-d6; 3.Nc3-e5 |
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variation |
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1) Dus-Khotimirsky variation |
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4.e3-Nbd7; 5.Bd3 (0 games) |
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2) 4.Nf3 |
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4.Nf3 |
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3) Rest in A54 |
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Rest |
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| A55 |
Old Indian: main line |
A55 |
1.d4-Nf6; 2.c4-d6; |
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3.Nc3-e5; 4.Nf3-Nbd7; 5.e4 |
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Eco A55 |
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| A56 |
Benoni defense |
A56 |
1.d4-Nf6; 2.c4-c5 |
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1) Hromodka system |
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3.d5-d6 |
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2) Vulture defense |
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3.d5-Ne4 |
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3) Czech Benoni defense |
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3.d5-e5 |
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4) Rest in A56 |
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Rest |
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| A57 |
Benko gambit (Volga |
A57 |
1.d4-Nf6; 2.c4-c5; 3.d5-b5 |
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gambit) |
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1) Benko gambit half accepted |
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4.cxb5-a6 |
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2) Rest in A57 |
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Rest |
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| A58 |
Benko gambit accepted |
A58 |
1.d4-Nf6; 2.c4-c5; 3.d5-b5; |
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4.cxb5-a6; 5.bxa6 |
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1) Nd2 variation |
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5...Bxa6; 6.Nc3-d6; 7.Nf3-g6; |
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8.Nd2 |
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2) Fianchetto variation |
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5...Bxa6; 6.Nc3-d6; 7.Nf3-g6; 8.g3 |
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3) Rest in A58 |
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Rest |
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| A59 |
Benko gambit: 7.e4 |
A59 |
1.d4-Nf6; 2.c4-c5; 3.d5-b5; |
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4.cxb5-a6; 5.bxa6-Bxa6; |
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6.Nc3-d6; 7.e4 |
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1) Ne2 variation |
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7...Bxf1; 8.Kxf1-g6; 9.Nge2 |
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2) 9.g3 |
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7...Bxf1; 8.Kxf1-g6; 9.g3 |
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3) Rest in A59 |
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Rest |
