Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Bf4 Nc6 3. e3 h6 4. Bb5 g5 5. Bxc6+ bxc6 6. Be5 f6 7. Bg3 e6 8. h3
h5 9. Qd3 Kf7 10. Nd2 Nh6 11. Qe2 Bd6 12. Qxh5+ Kg7 13. Bxd6 cxd6 14. O-O-O Qa5
15. Kb1 Rb8 16. Nb3 Qc7 17. Rd3 Nf5 18. Qf3 Nh4 19. Qg4 Kh6 20. g3 e5 21. Qe2
e4 22. Rc3 Nf5 23. g4 Nh4 24. f3 Re8 25. Qf2 Qf7 26. f4 Bd7 27. fxg5+ Kxg5 28.
Qf4+ Kg6 29. g5 fxg5 30. Qxd6+ Kg7 31. Nc5 *
Position (FEN): 1r2r3/p2b1qk1/2pQ4/2Np2p1/3Pp2n/2R1P2P/PPP5/1K4NR b - - 2 31
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1031
Best move: Qf1#