ECO B20 · Sicilian Defense

Sicilian Defense: Wing Gambit, Carlsbad Variation

1. e4 c5 2. b4 cxb4 3. a3 bxa3

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

4. Nf3−0.28

The position is roughly equal. Stockfish 18, depth 18.

Analyze this position

In the Sicilian Defense: Wing Gambit, Carlsbad Variation (B20), reached after 1. e4 c5 2. b4 cxb4 3. a3 bxa3, Stockfish 18 recommends 4. Nf3 for White. The position is roughly equal (−0.28).

Top engine moves

  1. −0.284. Nf3 e6 5. Nxa3 Nc6 6. Bd3 d6 7. O-O Nf6 8. c3 Be7
  2. −0.324. Nxa3 e6 5. Nf3 Nc6 6. Bd3 d5 7. exd5 Qxd5 8. O-O Nf6
  3. −0.324. Bxa3 e6 5. Bxf8 Kxf8 6. Nf3 d5 7. exd5 exd5 8. Bb5 Qe7+

Frequently asked questions

What is the best move in the Sicilian Defense: Wing Gambit, Carlsbad Variation?
After 1. e4 c5 2. b4 cxb4 3. a3 bxa3, Stockfish 18 at depth 18 recommends 4. Nf3 for White, continuing e6 5. Nxa3 Nc6 6. Bd3 d6 7. O-O Nf6 8. c3 Be7. The position is roughly equal (−0.28). The next best moves are 4. Nxa3 (−0.32) and 4. Bxa3 (−0.32).
Is the Sicilian Defense: Wing Gambit, Carlsbad Variation a good opening?
Stockfish rates the position at −0.28: 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 Sicilian Defense: Wing Gambit, Carlsbad Variation?
B20. ECO codes classify chess openings from A00 to E99; B is the volume for semi-open games (other than the French).

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