Nimzo-Indian defence (E20)
d4 Nf6 c4 e6 Nc3 Bb4
d4 Nf6 c4 e6 Nc3 Bb4
| Nimzo-Indian 4.e3 (E40) e3 | Bg5 Nimzo-Indian Leningrad variation (E30) |
| Nimzo-Indian Kmoch variation (E20) f3 | Nf3 Nimzo-Indian three knights variation (E21) |
| Nimzo-Indian Leningrad variation (E30) Bg5 | Qb3 Nimzo-Indian Spielmann variation (E22) |
| Nimzo-Indian Mikenas attack (E20) Qd3 | Qc2 Nimzo-Indian classical variation (E32) |
| Nimzo-Indian Romanishin-Kasparov system (E20) g3 | Qd3 Nimzo-Indian Mikenas attack (E20) |
| Nimzo-Indian S\"amisch variation (E24) a3 Bc3 bc | a3 Bc3 bc Nimzo-Indian S\"amisch variation (E24) |
| Nimzo-Indian Spielmann variation (E22) Qb3 | e3 Nimzo-Indian 4.e3 (E40) |
| Nimzo-Indian classical variation (E32) Qc2 | f3 Nimzo-Indian Kmoch variation (E20) |
| Nimzo-Indian three knights variation (E21) Nf3 | g3 Nimzo-Indian Romanishin-Kasparov system (E20) |