Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Nf3 e6 3. e3 Bd6 4. c4 f5 5. c5 Be7 6. Nc3 c6 7. b4 Nf6 8. a4 Nbd7
9. Bd3 O-O 10. Bb2 Ne4 11. Qe2 Qe8 12. Nd2 Qf7 13. O-O b6 14. f3 Ng5 15. f4 Ne4
16. Bxe4 fxe4 17. Rf2 bxc5 18. dxc5 a5 19. b5 cxb5 20. Nxb5 Bxc5 21. Nb3 Be7
22. Raf1 Ba6 23. Be5 Nxe5 24. fxe5 Qg6 25. N3d4 Bc5 26. Rxf8+ Rxf8 27. Rxf8+
Kxf8 28. Qc2 Bxd4 29. Nxd4 Qf7 30. Qc5+ Kg8 31. Qxa5 *
Position (FEN): 6k1/5qpp/b3p3/Q2pP3/P2Np3/4P3/6PP/6K1 b - - 0 31
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 484
Best move: Qf1#