ECO A52

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

6 named opening lines are classified under ECO code A52.

• Indian Defense: Budapest Gambit Accepted, Main Line — 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4
• Indian Defense: Budapest Gambit Accepted, Main Line, Adler Variation — 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3
• Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation — 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4
• Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Abonyi Variation — 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5
• Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Tartakower Defense — 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 d6
• Indian Defense: Budapest Gambit Accepted, Main Line, Rubinstein Variation — 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4