Chess puzzle (Crushing)
Opening: Ruy_Lopez, Ruy_Lopez_Cozio_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. d4 exd4 5. Nxd4 a6 6. Nxc6 Nxc6 7. Bc4 Bc5
8. Qd5 Qe7 9. Nc3 O-O 10. O-O Nb4 11. Qd2 b5 12. Bb3 Bb7 13. Re1 h6 14. a3 Nc6
15. Nd5 Qh4 16. Nxc7 Rac8 17. Nd5 Nd4 18. Nf4 Rfe8 19. Qd3 *
Position (FEN): 2r1r1k1/1b1p1pp1/p6p/1pb5/3nPN1q/PB1Q4/1PP2PPP/R1B1R1K1 b - - 6 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1707
Best move: Nxb3