Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 cxd4 8. Nxd4
Nc6 9. Nxc6 bxc6 10. Bxc6 Rb8 11. Bg2 Qa5 12. Qc2 Qh5 13. b3 Bh3 14. f3 d5 15.
cxd5 Bxg2 16. Kxg2 Rfc8 17. Qd3 Rxc3 18. Qxc3 Ne8 19. Qe3 Bxa1 20. Qxa7 Rc8 21.
Qb7 Nd6 22. Qxe7 Be5 23. g4 *
Position (FEN): 2r3k1/4Qp1p/3n2p1/3Pb2q/6P1/1P3P2/P3P1KP/2B2R2 b - - 0 23
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 831
Best move: Qxh2#