ECO B03 · Alekhine Defense

Alekhine Defense: Four Pawns Attack, Korchnoi Variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Be7 9. Be2 O-O 10. O-O f6

abcdefgh87654321
White to move. The arrow shows Stockfish’s best move.
Best move

11. Be3+0.67

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the Alekhine Defense: Four Pawns Attack, Korchnoi Variation (B03), reached after 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Be7 9. Be2 O-O 10. O-O f6, Stockfish 18 recommends 11. Be3 for White. White is slightly better (+0.67).

Top engine moves

  1. +0.6711. Be3 Nc6 12. exf6 Bxf6 13. Qd2 Qe7 14. Rad1 Rad8 15. Kh1 Na5
  2. +0.5811. a4 fxe5 12. Nxe5 N6d7 13. Nf3 Nc6 14. Be3 Nb4 15. Qd2 Nf6
  3. +0.5711. exf6 Bxf6 12. a4 Nc6 13. a5 Nd7 14. Bf4 a6 15. Qd2 e5

Frequently asked questions

What is the best move in the Alekhine Defense: Four Pawns Attack, Korchnoi Variation?
After 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Be7 9. Be2 O-O 10. O-O f6, Stockfish 18 at depth 18 recommends 11. Be3 for White, continuing Nc6 12. exf6 Bxf6 13. Qd2 Qe7 14. Rad1 Rad8 15. Kh1 Na5. White is slightly better (+0.67). The next best moves are 11. a4 (+0.58) and 11. exf6 (+0.57).
Is the Alekhine Defense: Four Pawns Attack, Korchnoi Variation a good opening?
Stockfish rates the position at +0.67: 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 Alekhine Defense: Four Pawns Attack, Korchnoi Variation?
B03. 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+).