ECO B43 · Sicilian Defense

Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3

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

7… Nc6+0.45

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack (B43), reached after 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3, Stockfish 18 recommends 7… Nc6 for Black. White is slightly better (+0.45).

Top engine moves

  1. +0.457… Nc6 8. O-O Bb7 9. a4 b4 10. a5 Qc7 11. Na4 Qxa5 12. Be3
  2. +0.527… Bb7 8. O-O Qc7 9. e5 f5 10. exf6 Nxf6 11. Ng5 Be7 12. a4
  3. +0.527… Qc7 8. O-O Bb7 9. e5 f5 10. exf6 Nxf6 11. Ng5 Be7 12. Nce4

Frequently asked questions

What is the best move in the Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack?
After 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3, Stockfish 18 at depth 18 recommends 7… Nc6 for Black, continuing 8. O-O Bb7 9. a4 b4 10. a5 Qc7 11. Na4 Qxa5 12. Be3. White is slightly better (+0.45). The next best moves are 7… Bb7 (+0.52) and 7… Qc7 (+0.52).
Is the Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack a good opening?
Stockfish rates the position at +0.45: 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 Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack?
B43. 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+).