Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 g6 3. c3 d5 4. e5 d4 5. Bb5+ Bd7 6. Bxd7+ Qxd7 7. O-O Bg7 8. d3
Nc6 9. Bf4 O-O-O 10. c4 f6 11. exf6 Nxf6 12. Ne5 Nxe5 13. Bxe5 Nh5 14. Bxg7
Nxg7 15. Nd2 e5 16. Ne4 Qc6 17. Qg4+ Kb8 18. f4 Nf5 19. fxe5 Ne3 20. Qg5 Nxf1
21. Rxf1 b5 22. cxb5 Qxb5 23. Qd2 Rhf8 24. Rc1 Rd5 25. a4 Qb4 26. Qh6 c4 27.
Rxc4 *
Position (FEN): 1k3r2/p6p/6pQ/3rP3/PqRpN3/3P4/1P4PP/6K1 b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 847
Best move: Qe1#