Chess puzzle (Crushing)
Opening: Italian_Game, Italian_Game_Giuoco_Pianissimo
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 h6 5. Nc3 Nf6 6. h3 d6 7. a3 Bd7 8. b4 Bb6
9. Nd5 Nxd5 10. exd5 Ne7 11. c3 Ng6 12. Nd2 Qf6 13. Qf3 Qd8 14. Bb3 O-O 15. Qg3
Qf6 16. Nc4 Nf4 17. Nxb6 axb6 18. Bxf4 *
Position (FEN): r4rk1/1ppb1pp1/1p1p1q1p/3Pp3/1P3B2/PBPP2QP/5PP1/R3K2R b KQ - 0 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 930
Best move: exf4