ECO C42 · Petrov's Defense

Petrov's Defense: Classical Attack, Marshall Trap

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+

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

11. Kf1−0.83

Black is clearly better. Stockfish 18, depth 18.

Analyze this position

In the Petrov's Defense: Classical Attack, Marshall Trap (C42), reached after 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+, Stockfish 18 recommends 11. Kf1 for White. Black is clearly better (−0.83).

Top engine moves

  1. −0.8311. Kf1 Qe8 12. Nc3 Qh5 13. Nxe4 fxe4 14. Rxe4 Bxf3 15. gxf3 Nd7
  2. −0.9411. Kxh2 Nxf2 12. Qe2 Nxd3 13. Qe6+ Kh8 14. Bg5 Qd6+ 15. Qxd6 cxd6
  3. −2.5711. Nxh2 Bxd1 12. Rxd1 Qd6 13. Nf3 Nd7 14. Nc3 a6 15. Nxe4 fxe4

Frequently asked questions

What is the best move in the Petrov's Defense: Classical Attack, Marshall Trap?
After 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+, Stockfish 18 at depth 18 recommends 11. Kf1 for White, continuing Qe8 12. Nc3 Qh5 13. Nxe4 fxe4 14. Rxe4 Bxf3 15. gxf3 Nd7. Black is clearly better (−0.83). The next best moves are 11. Kxh2 (−0.94) and 11. Nxh2 (−2.57).
Is the Petrov's Defense: Classical Attack, Marshall Trap a good opening?
Stockfish rates the position at −0.83: Black is clearly better. That is a large edge for an opening position, so check the engine lines before playing it from the other side.
What is the ECO code of the Petrov's Defense: Classical Attack, Marshall Trap?
C42. ECO codes classify chess openings from A00 to E99; C is the volume for open games and the French Defense.

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