Chess puzzle (Crushing)
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 b5 6. b3 bxc4 7. bxc4 Bb7 8. a3
Ba5 9. Bd2 d5 10. Rb1 Ba6 11. cxd5 Nxd5 12. Nxd5 Bxd2+ 13. Nxd2 Qxd5 14. e3
Bxf1 15. Rxf1 Qxg2 16. Qxc7 Na6 17. Qg3 Qd5 18. Rg1 g6 19. Ke2 Nc7 20. h4 Nb5
21. a4 *
Position (FEN): r4rk1/p4p1p/4p1p1/1n1q4/P2P3P/4P1Q1/3NKP2/1R4R1 b - - 0 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1007
Best move: Nc3+