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ECO A37

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

2 named opening lines are classified under ECO code A37.

English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 — 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5
English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation — 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3