ECO E20

ECO E00–E99 — Indian Defenses: 1.d4 Nf6 with the Nimzo-Indian, Queen's Indian, Catalan and King's Indian complexes.

6 named opening lines are classified under ECO code E20.

• Nimzo-Indian Defense — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
• Nimzo-Indian Defense: Dilworth Gambit — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e4
• Nimzo-Indian Defense: Kmoch Variation — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3
• Nimzo-Indian Defense: Mikenas Attack — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qd3
• Nimzo-Indian Defense: Romanishin Variation — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3
• Nimzo-Indian Defense: Romanishin Variation, English Hybrid — 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 cxd4 6.Nxd4 O-O 7.Bg2 d5 8.cxd5 Nxd5