Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Old_Sicilian
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bc4 g6 4. O-O Bg7 5. c3 d6 6. d4 cxd4 7. cxd4 Nxd4 8.
Nxd4 Nf6 9. Bb5+ Bd7 10. Bxd7+ Qxd7 11. Nc3 O-O 12. f3 a6 13. Be3 e6 14. Qd2 d5
15. exd5 Nxd5 16. Nxd5 Qxd5 17. Qb4 a5 18. Qa3 *
Position (FEN): r4rk1/1p3pbp/4p1p1/p2q4/3N4/Q3BP2/PP4PP/R4RK1 b - - 1 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 971
Best move: Bxd4