| ECO |
Opening Name |
MOVES (Algebraic System) |
| |
|
|
| E00-E09 |
Queen's pawn game |
1.d4-Nf6; 2.c4-e6 |
| |
Others (E00) |
3.Others and 3.g3-others |
| |
Catalan opening (E01-E09) |
3.g3-d5; 4.Bg2 |
| |
|
|
| E10-E19 |
Queen's pawn game |
1.d4-Nf6; 2.c4-e6; 3.Nf3 |
| |
Others (E10) |
3...Others |
| |
Bogo-Indian defense (E11) |
3...Bb4 |
| |
Queen's Indian defense (E12-E19) |
3...b6 |
| |
|
|
| E20-E29 |
Nimzo-Indian defense |
1.d4-Nf6; 2.c4-e6; 3.Nc3-Bb4 |
| |
Others (E20) |
4.Others |
| |
Three knights variation (E21) |
4.Nf3 |
| |
Spielmann variation (E22-E23) |
4.Qb3 |
| |
Saemisch variation (E24-E29) |
4.a3-Bxc3; 5.bxc3 |
| |
|
|
| E30-E39 |
Nimzo-Indian defense |
1.d4-Nf6; 2.c4-e6; 3.Nc3-Bb4 |
| |
Leningrad variation (E30-E31) |
4.Bg5 |
| |
Classical variation (E32-E39) |
4.Qc2 |
| |
|
|
| E40-E49 |
Nimzo-Indian defense (4.e3) |
1.d4-Nf6; 2.c4-e6; 3.Nc3-Bb4; |
| |
|
4.e3 |
| |
Others (E40) |
4...Others |
| |
Nimzo-Indian (4.e3-c5) (E41-E42) |
4...c5 |
| |
Fischer variation (E43-E45) |
4...b6 |
| |
4.e3-O-O variation (E46-E49) |
4...O-O |
| |
|
|
| E50-E59 |
Nimzo-Indian (4.e3, 5.Nf3) |
1.d4-Nf6; 2.c4-e6; 3.Nc3-Bb4; |
| |
|
4.e3-O-O; 5.Nf3 |
| |
Others (E50) |
5...Others |
| |
5...d5 variation (E51-E59) |
5...d5 |
| |
|
|
| E60-E69 |
King's Indian defense |
1.d4-Nf6; 2.c4-g6 |
| |
Others (E60) |
3.Others |
| |
3.Nc3 variation (E61-E69) |
3.Nc3 |
| |
|
|
| E70-E79 |
King's Indian defense |
1.d4-Nf6; 2.c4-g6; 3.Nc3-Bg7; |
| |
|
4.e4 |
| |
Others (E70) |
4...Others and 4...d6 |
| |
Makagonov system (5.h3) (E71) |
4...d6; 5.h3 |
| |
With 4.e4, 5.g3 (E72) |
4...d6; 5.g3 |
| |
5.Be2 variation (E73-E75) |
4...d6; 5.Be2 |
| |
Four pawns attack (E76-E79) |
4...d6; 5.f4 |
| |
|
|
| E80-E89 |
King's Indian (Saemisch |
1.d4-Nf6; 2.c4-g6; 3.Nc3-Bg7; |
| |
variation) |
4.e4-d6; 5.f3 |
| |
Others (E80) |
5...Others |
| |
With 5...O-O (E81-E89) |
5...O-O |
| |
|
|
| E90-E99 |
King's Indian defense (5.Nf3) |
1.d4-Nf6; 2.c4-g6; 3.Nc3-Bg7; |
| |
|
4.e4-d6; 5.Nf3 |
| |
Others (E90) |
|
| |
With 5...O-O (E91-E99) |
|
