ECO A58 · Benko Gambit Accepted

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

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Black to move. The arrow shows Stockfish’s best move.
Best move

9… O-O+0.48

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the Benko Gambit Accepted: Fianchetto Variation (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, Stockfish 18 recommends 9… O-O for Black. White is slightly better (+0.48).

Top engine moves

  1. +0.489… O-O 10. O-O Nbd7 11. Rb1 Ne8 12. Qc2 Bxc3 13. Qxc3 Bxe2 14. Re1
  2. +0.559… Qa5 10. O-O Nbd7 11. Bd2 Qc7 12. Re1 Qb7 13. b3 O-O 14. Rc1
  3. +0.579… Nbd7 10. O-O O-O 11. Rb1 Ne8 12. Qc2 Bxc3 13. Qxc3 Bxe2 14. Re1

Frequently asked questions

What is the best move in the 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, Stockfish 18 at depth 18 recommends 9… O-O for Black, continuing 10. O-O Nbd7 11. Rb1 Ne8 12. Qc2 Bxc3 13. Qxc3 Bxe2 14. Re1. White is slightly better (+0.48). The next best moves are 9… Qa5 (+0.55) and 9… Nbd7 (+0.57).
Is the Benko Gambit Accepted: Fianchetto Variation a good opening?
Stockfish rates the position at +0.48: white is slightly better. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the Benko Gambit Accepted: Fianchetto Variation?
A58. ECO codes classify chess openings from A00 to E99; A is the volume for flank openings.

Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).