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ECO A53

ECO A00–A99 — Flank openings: 1.c4, 1.Nf3, 1.f4 and other first moves, plus early Indian and Benoni systems.

7 named opening lines are classified under ECO code A53.

Old Indian Defense: Aged Gibbon Gambit — 1.d4 Nf6 2.c4 d6 3.g4
Old Indian Defense: Czech Variation, with Nc3 — 1.d4 Nf6 2.c4 d6 3.Nc3 c6
Old Indian Defense: Czech Variation, with Nf3 — 1.d4 Nf6 2.c4 d6 3.Nf3 c6
Old Indian Defense: Janowski Variation — 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5
Old Indian Defense: Janowski Variation, Fianchetto Variation — 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.g3
Old Indian Defense: Janowski Variation, Grinberg Gambit — 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.e4
Old Indian Defense: Janowski Variation, Main Line — 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.f3