ECO family guide

Benko Gambit Accepted — all variations and ECO codes

10 named lines across 3 ECO codes (A57–A59). Source: the CC0-licensed lichess.org opening database.

The main line

Position after 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 (A57). Open this line on Lichess → · Benko Gambit Accepted on Lichess

How the main line scores at your rating

Real Lichess win rates for 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6, playing as black — the family's other variations are not separately tracked for win rate yet, main line only.

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Win/draw/loss rate by rating band
Rating band	Games	White / draw / Black	Score for black
1400-1600	29,540	44.8% / 3.2% / 52.0%	53.6%
1600-1800	161,545	43.5% / 4.1% / 52.5%	54.5%
1800-2000	556,207	43.4% / 5.0% / 51.6%	54.1%
2000+	1,598,389	46.1% / 6.7% / 47.2%	50.6%

All 10 named variations

Every named line in the Benko Gambit Accepted family, from the CC0-licensed ECO classification — not separately tracked for win rate, but every ECO code and move sequence is real, sourced data.

A57Benko Gambit Accepted (main line) — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6
A57Dlugy Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.f3
A57Modern Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.e3
A57Pawn Return Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6
A58Central Storming Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bxa6 7.f4
A58Fianchetto Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bxa6 7.g3 d6 8.Bg2 Bg7 9.Nf3
A58Fully Accepted Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6
A59King Walk Variation — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bxa6 7.Nf3 d6 8.e4 Bxf1 9.Kxf1 Bg7 10.g3 O-O 11.Kg2
A59Yugoslav — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4
A59Yugoslav — 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bxa6 7.e4 Bxf1 8.Kxf1 d6 9.Nge2