Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. Ne2
Qb6 9. Rb1 Qa5+ 10. c3 Qxa2 11. g4 cxd4 12. Nexd4 Qa5 13. Bd3 Nc5 14. Be2 Ne4
15. O-O Be7 16. f5 O-O 17. Kh1 f6 18. exf6 Bxf6 19. Nxc6 bxc6 20. g5 Be7 21. f6
gxf6 22. gxf6 Bxf6 23. Nd4 Qc7 24. Qe1 c5 25. Nf3 Bb7 26. Rg1+ Kh8 27. Rg2 Rg8
28. Qg1 Rxg2 29. Qxg2 Rg8 30. Qh3 Qf4 31. Bxf4 *
Position (FEN): 6rk/1b5p/p3pb2/2pp4/4nB2/2P2N1Q/1P2B2P/1R5K b - - 0 31
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1117
Best move: Nf2#