Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bb5 Bd7 7. Bg5 Qb6 8.
Be3 Qa5 9. O-O a6 10. Bxc6 bxc6 11. a3 e5 12. Nf3 Be7 13. b4 Qc7 14. Nd2 O-O
15. Nc4 d5 16. exd5 cxd5 17. Nb6 d4 18. Nxa8 Rxa8 19. Bxd4 exd4 20. Qxd4 Ng4
21. Nd5 *
Position (FEN): r5k1/2qbbppp/p7/3N4/1P1Q2n1/P7/2P2PPP/R4RK1 b - - 2 21
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 733
Best move: Qxh2#