ECO E09

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

4 named opening lines are classified under ECO code E09.

• Catalan Opening: Closed Variation, Rabinovich Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Qc2 e6 5.Nbd2 Be7 6.g3 Nbd7 7.Bg2 O-O 8.O-O b5
• Catalan Opening: Closed Variation, Traditional Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Be7 5.Bg2 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2 b6
• Catalan Opening: Closed, Main Line — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Be7 5.Bg2 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2
• Catalan Opening: Closed, Sokolsky Variation — 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2 b6 9.b3 a5 10.Bb2 Ba6