Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Closed
Moves: 1. e4 c5 2. Nc3 Nc6 3. Nf3 e6 4. Bb5 a6 5. Bxc6 bxc6 6. d4 cxd4 7. Nxd4 d5 8.
exd5 cxd5 9. Qe2 Bd7 10. a4 Bc5 11. Nf3 Nf6 12. O-O O-O 13. Ne5 Rc8 14. Nxd7
Qxd7 15. Nd1 Qd6 16. c3 Bb6 17. b4 Bc7 18. a5 *
Position (FEN): 2r2rk1/2b2ppp/p2qpn2/P2p4/1P6/2P5/4QPPP/R1BN1RK1 b - - 0 18
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 582
Best move: Qxh2#