ECO A57

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

15 named opening lines are classified under ECO code A57.

• Benko Gambit — 1.d4 Nf6 2.c4 c5 3.d5 b5
• Benko Gambit Accepted — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6
• Benko Gambit Accepted: Dlugy Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.f3
• Benko Gambit Accepted: Modern Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.e3
• Benko Gambit Accepted: Pawn Return Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6
• Benko Gambit Declined: Bishop Attack — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Bg5
• Benko Gambit Declined: Hjørring Countergambit — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.e4
• Benko Gambit Declined: Main Line — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3
• Benko Gambit Declined: Pseudo-Sämisch — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.f3
• Benko Gambit Declined: Quiet Line — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nd2
• Benko Gambit Declined: Sosonko Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.a4
• Benko Gambit: Mutkin Countergambit — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.g4
• Benko Gambit: Nescafe Frappe Attack — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Bc4
• Benko Gambit: Zaitsev System — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3
• Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5