ECO B07 · Lion Defense

Lion Defense: Anti-Philidor, Lion's Cave

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4 e5

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

5. Nf3+0.65

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the Lion Defense: Anti-Philidor, Lion's Cave (B07), reached after 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4 e5, Stockfish 18 recommends 5. Nf3 for White. White is slightly better (+0.65).

Top engine moves

  1. +0.655. Nf3 exd4 6. Qxd4 c6 7. Bd2 Qb6 8. O-O-O Qxd4 9. Nxd4 g6
  2. +0.525. Be3 c6 6. Bd3 b5 7. Qf3 b4 8. Nd1 Be7 9. Ne2 O-O
  3. +0.375. Be2 Be7 6. Nf3 c6 7. O-O O-O 8. Kh1 exd4 9. Qxd4 Nc5

Variations

Frequently asked questions

What is the best move in the Lion Defense: Anti-Philidor, Lion's Cave?
After 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4 e5, Stockfish 18 at depth 18 recommends 5. Nf3 for White, continuing exd4 6. Qxd4 c6 7. Bd2 Qb6 8. O-O-O Qxd4 9. Nxd4 g6. White is slightly better (+0.65). The next best moves are 5. Be3 (+0.52) and 5. Be2 (+0.37).
Is the Lion Defense: Anti-Philidor, Lion's Cave a good opening?
Stockfish rates the position at +0.65: 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: Anti-Philidor, Lion's Cave?
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+).