ECO E12
ECO E00–E99 — Indian Defenses: 1.d4 Nf6 with the Nimzo-Indian, Queen's Indian, Catalan and King's Indian complexes.
18 named opening lines are classified under ECO code E12.
- Queen's Indian Defense — 1.d4 Nf6 2.c4 e6 3.Nf3 b6
- Queen's Indian Defense: Kasparov Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3
- Queen's Indian Defense: Kasparov Variation, Botvinnik Attack — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5
- Queen's Indian Defense: Kasparov-Petrosian Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3
- Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 Ne4
- Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 exd5
- Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 g6
- Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2
- Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5
- Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 Be7
- Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5
- Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.e3
- Queen's Indian Defense: Kasparov-Petrosian Variation, Polovodin Gambit — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 Nxd5 7.e4
- Queen's Indian Defense: Kasparov-Petrosian Variation, Rashkovsky Attack — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Qa4+
- Queen's Indian Defense: Kasparov-Petrosian Variation, Romanishin Attack — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Bd2
- Queen's Indian Defense: Miles Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Bf4
- Queen's Indian Defense: Petrosian Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3
- Queen's Indian Defense: Petrosian Variation, Farago Defense — 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Ba6 5.Qc2 Bb7