Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. Nf3 c6 4. cxd5 exd5 5. Nc3 Be6 6. Ng5 Be7 7. Nxe6 fxe6 8.
e4 Nf6 9. e5 Ne4 10. f3 Ng5 11. Bd3 O-O 12. Qc2 Qb6 13. Ne2 Nd7 14. Bxg5 Bxg5
15. Bxh7+ Kh8 16. O-O Be3+ 17. Kh1 Bxd4 18. Nxd4 Qxd4 19. Rae1 Nxe5 20. Bd3 Rf6
21. Rd1 Raf8 22. Be2 Qe3 23. Rd3 Nxd3 24. Bxd3 Rxf3 25. Rxf3 Qe1+ 26. Rf1 Rxf1+
27. Bxf1 *
Position (FEN): 7k/pp4p1/2p1p3/3p4/8/8/PPQ3PP/4qB1K b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 723
Best move: Qxf1#