ECO B07 · Lion Defense

Lion Defense: Bayonet Attack

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. g4

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

4… h6+0.59

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the Lion Defense: Bayonet Attack (B07), reached after 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. g4, Stockfish 18 recommends 4… h6 for Black. White is slightly better (+0.59).

Top engine moves

  1. +0.594… h6 5. h3 e5 6. Nge2 b5 7. Ng3 b4 8. Nd5 Nxd5 9. exd5
  2. +0.884… g6 5. g5 Nh5 6. Be2 Bg7 7. Be3 c5 8. Bxh5 gxh5 9. Nge2
  3. +1.074… e5 5. g5 Ng8 6. Be3 c6 7. Qg4 h6 8. g6 Qf6 9. gxf7+

Frequently asked questions

What is the best move in the Lion Defense: Bayonet Attack?
After 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. g4, Stockfish 18 at depth 18 recommends 4… h6 for Black, continuing 5. h3 e5 6. Nge2 b5 7. Ng3 b4 8. Nd5 Nxd5 9. exd5. White is slightly better (+0.59). The next best moves are 4… g6 (+0.88) and 4… e5 (+1.07).
Is the Lion Defense: Bayonet Attack a good opening?
Stockfish rates the position at +0.59: 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 Lion Defense: Bayonet Attack?
B07. 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+).