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ECO A54

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

4 named opening lines are classified under ECO code A54.

Old Indian Defense: Duz-Khotimirsky Variation — 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.e3 Nbd7 5.Bd3
Old Indian Defense: Tartakower-Indian — 1.d4 Nf6 2.c4 d6 3.Nf3 Bg4
Old Indian Defense: Two Knights Variation — 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3
Old Indian Defense: Ukrainian Variation — 1.d4 Nf6 2.c4 d6 3.Nc3 e5