Pterodactyl Defense: Sicilian, Unpin
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Bd2
5… cxd4+0.03
The position is roughly equal. Stockfish 18, depth 18.
Analyze this positionIn the Pterodactyl Defense: Sicilian, Unpin (B27), reached after 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Bd2, Stockfish 18 recommends 5… cxd4 for Black. The position is roughly equal (+0.03).
Top engine moves
- +0.035… cxd4 6. Nd5 Qd8 7. Bf4 d6 8. Nxd4 Nf6 9. Nxf6+ Bxf6 10. Be3
- +1.165… d6 6. Nd5 Qd8 7. dxc5 Nf6 8. Nxf6+ Bxf6 9. cxd6 Qxd6 10. c3
- +1.715… Qd8 6. dxc5 b6 7. cxb6 axb6 8. Bb5 Bb7 9. O-O Nf6 10. Re1
Frequently asked questions
What is the best move in the Pterodactyl Defense: Sicilian, Unpin?
After 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Bd2, Stockfish 18 at depth 18 recommends 5… cxd4 for Black, continuing 6. Nd5 Qd8 7. Bf4 d6 8. Nxd4 Nf6 9. Nxf6+ Bxf6 10. Be3. The position is roughly equal (+0.03). The next best moves are 5… d6 (+1.16) and 5… Qd8 (+1.71).
Is the Pterodactyl Defense: Sicilian, Unpin a good opening?
Stockfish rates the position at +0.03: the position is roughly equal. 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 Pterodactyl Defense: Sicilian, Unpin?
B27. 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+).