ECO E73

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

9 named opening lines are classified under ECO code E73.

• King's Indian Defense: Averbakh Variation — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5
• King's Indian Defense: Averbakh Variation, Flexible Defense — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 h6
• King's Indian Defense: Averbakh Variation, Geller Defense — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nbd7
• King's Indian Defense: Averbakh Variation, Modern Defense — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Na6
• King's Indian Defense: Averbakh Variation, Modern Defense, Burgess Line — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Na6 7.Qd2 c6
• King's Indian Defense: Averbakh Variation, Nc6 Defense — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nc6
• King's Indian Defense: Averbakh Variation, Spanish Defense — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 a6
• King's Indian Defense: Normal Variation, Standard Development — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2
• King's Indian Defense: Semi-Averbakh System — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Be3