Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Bc4 Nf6 3. Nc3 Bc5 4. d3 O-O 5. Bg5 a6 6. Nf3 Nc6 7. O-O b5 8. Bd5
Bb7 9. Nxe5 Be7 10. Bxc6 dxc6 11. f4 c5 12. Kh1 Qd6 13. Nf3 h6 14. Bxf6 Qxf6
15. Ne5 Qh4 16. g3 Qh3 17. Qf3 f5 18. Rae1 Bf6 19. Nd7 Rf7 20. Nxc5 Bxc3 21.
bxc3 Bc6 22. Qg2 Qh5 23. Kg1 Raf8 24. Qd2 g5 25. e5 gxf4 26. Qxf4 Qh3 27. d4 *
Position (FEN): 5rk1/2p2r2/p1b4p/1pN1Pp2/3P1Q2/2P3Pq/P1P4P/4RRK1 b - - 0 27
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 820
Best move: Qg2#