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ECO CODES | |
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(Click on an opening description to see diagram) |
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E20 - E59 |
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E20 |
Nimzo-Indian defence 1. d2d4  g8f6
2.
c2c4
e7e6
3.
b1c3
 f8b4
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|
E20 |
Nimzo-Indian: Kmoch variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
f2f3
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|
E20 |
Nimzo-Indian: Mikenas attack 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
 d1d3
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E20 |
Nimzo-Indian: Romanishin-Kasparov (Steiner) system 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
g2g3
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|
E21 |
Nimzo-Indian: three knights variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
g1f3
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E21 |
Nimzo-Indian: three knights, Korchnoi variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
g1f3
c7c5
5.
d4d5
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E21 |
Nimzo-Indian: three knights, Euwe variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
g1f3
c7c5
5.
d4d5
f6e4
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E22 |
Nimzo-Indian: Spielmann variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1b3
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E23 |
Nimzo-Indian: Spielmann, 4...c5, 5.dc Nc6 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1b3
c7c5
5.
d4c5
b8c6
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E23 |
Nimzo-Indian: Spielmann, Karlsbad variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1b3
c7c5
5.
d4c5
b8c6
6. g1f3
f6e4
7.
c1d2
e4d2
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E23 |
Nimzo-Indian: Spielmann, San Remo variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1b3
c7c5
5.
d4c5
b8c6
6. g1f3
f6e4
7.
c1d2
e4c5
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E23 |
Nimzo-Indian: Spielmann, Staahlberg variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1b3
c7c5
5.
d4c5
b8c6
6. g1f3
f6e4
7.
c1d2
e4c5
8.
b3c2
f7f5
9.
g2g3
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E24 |
Nimzo-Indian: Saemisch variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
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E24 |
Nimzo-Indian: Saemisch, Botvinnik variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
c7c5
6. f2f3 d7d5 7. e2e3 0-0 8. c4d5 f6d5
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E25 |
Nimzo-Indian: Saemisch variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
c7c5
6. f2f3 d7d5 7. c4d5 |
|
E25 |
Nimzo-Indian: Saemisch, Keres variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
c7c5
6. f2f3 d7d5 7. c4d5 f6d5
8.
d4c5
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E25 |
Nimzo-Indian: Saemisch, Romanovsky variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
c7c5
6. f2f3 d7d5 7. c4d5 f6d5
8.
d4c5
f7f5
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E26 |
Nimzo-Indian: Saemisch variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
c7c5
6. e2e3 |
|
E26 |
Nimzo-Indian: Saemisch, O'Kelly variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
c7c5
6. e2e3 b7b6 |
|
E27 |
Nimzo-Indian: Saemisch variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
0-0
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E28 |
Nimzo-Indian: Saemisch variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
0-0
6. e2e3 |
|
E29 |
Nimzo-Indian: Saemisch, main line 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
0-0
6. e2e3 c7c5 7. f1d3
b8c6
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E29 |
Nimzo-Indian: Saemisch, Capablanca variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
a2a3
b4c3
5.
b2c3
0-0
6. e2e3 c7c5 7. f1d3
b8c6
8.
g1e2
b7b6
9.
e3e4
f6e8
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E30 |
Nimzo-Indian: Leningrad variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
c1g5
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E30 |
Nimzo-Indian: Leningrad, ...b5 gambit 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
c1g5
h7h6
5.
g5h4
c7c5
6. d4d5 b7b5 |
|
E31 |
Nimzo-Indian: Leningrad, main line 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
c1g5
h7h6
5.
g5h4
c7c5
6. d4d5 d7d6 |
|
E32 |
Nimzo-Indian: classical variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
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E32 |
Nimzo-Indian: classical, Adorjan gambit 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
0-0
5.
a2a3
b4c3
6. c2c3
b7b5
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E33 |
Nimzo-Indian: classical, 4...Nc6 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
b8c6
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E33 |
Nimzo-Indian: classical, Milner-Barry (Zurich) variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
b8c6
5.
g1f3
d7d6
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E34 |
Nimzo-Indian: classical, Noa variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
d7d5
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E35 |
Nimzo-Indian: classical, Noa variation, 5.cd ed 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
d7d5
5.
c4d5
e6d5
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E36 |
Nimzo-Indian: classical, Noa variation, 5.a3 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
d7d5
5.
a2a3
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E36 |
Nimzo-Indian: classical, Botvinnik variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
d7d5
5.
a2a3
b4c3
6. c2c3
b8c6
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E36 |
Nimzo-Indian: classical, Noa variation, main line 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
d7d5
5.
a2a3
b4c3
6. c2c3
f6e4
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E37 |
Nimzo-Indian: classical, Noa variation, main line, 7.Qc2 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
d7d5
5.
a2a3
b4c3
6. c2c3
f6e4
7.
c3c2
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|
E37 |
Nimzo-Indian: classical, San Remo variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
d7d5
5.
a2a3
b4c3
6. c2c3
f6e4
7.
c3c2
b8c6
8.
e2e3
e6e5
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|
E38 |
Nimzo-Indian: classical, 4...c5 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
c7c5
|
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E39 |
Nimzo-Indian: classical, Pirc variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
d1c2
c7c5
5.
d4c5
0-0
|
|
E40 |
Nimzo-Indian: 4.e3 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
|
|
E40 |
Nimzo-Indian: 4.e3, Taimanov variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
b8c6
|
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E41 |
Nimzo-Indian: 4.e3 c5 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
c7c5
|
|
E41 |
Nimzo-Indian: e3, Huebner variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
c7c5
5.
f1d3
b8c6
6. g1f3
b4c3
7.
b2c3
d7d6
|
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E42 |
Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein) 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
c7c5
5.
g1e2
|
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E43 |
Nimzo-Indian: Fischer variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
b7b6
|
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E44 |
Nimzo-Indian: Fischer variation, 5.Ne2 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
b7b6
5.
g1e2
|
|
E45 |
Nimzo-Indian: 4.e3, Bronstein (Byrne) variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
b7b6
5.
g1e2
c8a6
|
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E46 |
Nimzo-Indian: 4.e3 O-O 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
|
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E46 |
Nimzo-Indian: Reshevsky variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1e2
|
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E46 |
Nimzo-Indian: Simagin variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1e2
d7d5
6. a2a3 b4d6
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E47 |
Nimzo-Indian: 4.e3 O-O, 5.Bd3 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
f1d3
|
|
E48 |
Nimzo-Indian: 4.e3 O-O, 5.Bd3 d5 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
f1d3
d7d5
|
|
E49 |
Nimzo-Indian: 4.e3, Botvinnik system 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
f1d3
d7d5
6. a2a3 b4c3
7.
b2c3
|
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E50 |
Nimzo-Indian: 4.e3 e8g8, 5.Nf3, without ...d5 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
|
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E51 |
Nimzo-Indian: 4.e3 e8g8, 5.Nf3 d7d5 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
|
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E51 |
Nimzo-Indian: 4.e3, Ragozin variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
b8c6
7.
0-0
d5c4
|
|
E52 |
Nimzo-Indian: 4.e3, main line with ...b6 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
b7b6
|
|
E53 |
Nimzo-Indian: 4.e3, main line with ...c5 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
|
|
E53 |
Nimzo-Indian: 4.e3, Keres variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
b7b6
|
|
E53 |
Nimzo-Indian: 4.e3, Gligoric system with 7...Nbd7 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
b8d7
|
|
E54 |
Nimzo-Indian: 4.e3, Gligoric system with 7...dc 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
d5c4
8.
d3c4
|
|
E54 |
Nimzo-Indian: 4.e3, Gligoric system, Smyslov variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
d5c4
8.
d3c4
d8e7
|
|
E55 |
Nimzo-Indian: 4.e3, Gligoric system, Bronstein variation 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
d5c4
8.
d3c4
b8d7
|
|
E56 |
Nimzo-Indian: 4.e3, main line with 7...Nc6 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
b8c6
|
|
E57 |
Nimzo-Indian: 4.e3, main line with 8...dc and 9...cd 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
b8c6
8.
a2a3
d5c4
9.
d3c4
c5d4
|
|
E58 |
Nimzo-Indian: 4.e3, main line with 8...Bxc3 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
b8c6
8.
a2a3
b4c3
9.
b2c3
|
|
E59 |
Nimzo-Indian: 4.e3, main line 1. d2d4 g8f6
2.
c2c4
e7e6
3.
b1c3
f8b4
4.
e2e3
0-0
5.
g1f3
d7d5
6. f1d3
c7c5
7.
0-0
b8c6
8.
a2a3
b4c3
9.
b2c3
d5c4
10.
d3c4
|
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