Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nc6 5. Bb5 Bd7 6. O-O a6 7. Bc4 e6 8. Nc3
Qc7 9. f4 Nf6 10. e5 dxe5 11. fxe5 Qxe5 12. Nxc6 Bxc6 13. Kh1 Bd6 14. Bf4 Qc5
15. Qxd6 Qxc4 16. Bg5 Rd8 17. Qg3 Rd4 18. Bxf6 gxf6 19. Qg7 Rf8 20. Qxf6 Rg4
21. Rg1 Rfg8 22. Rad1 Bd7 23. Rgf1 R8g7 24. Rxd7 Kxd7 25. Rd1+ Kc6 26. Qd8 Rd4
27. Rxd4 *
Position (FEN): 3Q4/1p3prp/p1k1p3/8/2qR4/2N5/PPP3PP/7K b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 573
Best move: Qf1#