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ECO A50

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 A50.

Indian Defense: Medusa Gambit — 1.d4 Nf6 2.c4 g5
Indian Defense: Normal Variation — 1.d4 Nf6 2.c4
Indian Defense: Pyrenees Gambit — 1.d4 Nf6 2.c4 b5
Mexican Defense — 1.d4 Nf6 2.c4 Nc6
Mexican Defense: Horsefly Gambit — 1.d4 Nf6 2.c4 Nc6 3.d5 Ne5 4.f4
Queen's Indian Accelerated — 1.d4 Nf6 2.c4 b6
Slav Indian — 1.d4 Nf6 2.c4 c6