Benko Gambit Accepted: Fianchetto 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

Benko Gambit Accepted: Fianchetto Variation after 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 87654321abcdefgh

The Benko Gambit Accepted: Fianchetto Variation is a chess opening classified as ECO A58, reached after 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. It is a line of the Benko Gambit Accepted. Black is to move.

In 12.6 million rated Lichess games (blitz and slower), this position was reached 5 times by this move order. White won 20%, 0% were drawn and Black won 80%. The most popular continuation is 9… Nbd7 (40% of games).

Engine evaluation: +0.57 (Stockfish, depth 34; best line 9… Nbd7 10. Rb1 O-O 11. O-O Qa5 12. Bd2)

ECO
A58
Moves
17 plies
FEN
rn1qk2r/4ppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R b KQkq - 3 9
PGN
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

Analyse with Stockfish · Board image (SVG) · Open on Lichess

Results by rating

Average ratingGamesWhite / draw / Black
2000+520%80%
All520%80%

Most played moves

MoveGamesWhite / draw / Black
9… Nbd72 (40%)50%50%
9… O-O2 (40%)100%
9… Nfd71 (20%)100%

Master games

184 over-the-board games are classified under this line (White 41%, draw 25%, Black 34%). The strongest:

Search all games of the Benko Gambit Accepted: Fianchetto Variation and its sub-variations

Highest-rated Lichess games

Comes from

Benko Gambit Accepted: Fully Accepted Variation 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6

More Benko Gambit Accepted lines (all)

Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.