Benko Gambit Declined: Sosonko Variation
1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4
4… b4−0.05
The position is roughly equal. Stockfish 18, depth 18.
Analyze this positionIn the Benko Gambit Declined: Sosonko Variation (A57), reached after 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4, Stockfish 18 recommends 4… b4 for Black. The position is roughly equal (−0.05).
Top engine moves
- −0.054… b4 5. Nd2 d6 6. e4 g6 7. b3 Bg7 8. Bb2 O-O 9. Qc2
- +0.114… Qa5+ 5. Bd2 b4 6. Qc2 d6 7. e4 g6 8. Nf3 Bg7 9. h3
- +0.224… bxc4 5. Nc3 Ba6 6. Nf3 d6 7. e4 Nbd7 8. Bd2 g6 9. b3
Frequently asked questions
What is the best move in the Benko Gambit Declined: Sosonko Variation?
After 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4, Stockfish 18 at depth 18 recommends 4… b4 for Black, continuing 5. Nd2 d6 6. e4 g6 7. b3 Bg7 8. Bb2 O-O 9. Qc2. The position is roughly equal (−0.05). The next best moves are 4… Qa5+ (+0.11) and 4… bxc4 (+0.22).
Is the Benko Gambit Declined: Sosonko Variation a good opening?
Stockfish rates the position at −0.05: the position is roughly equal. 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 Declined: Sosonko Variation?
A57. 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+).