Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bd6 6. d4 Qe7 7. dxe5 Bxe5 8.
Bg5 f6 9. Nxe5 fxg5 10. Qh5+ g6 11. Nxg6 hxg6 12. Qxh8 Be6 13. Nc3 O-O-O 14.
Qe5 Nh6 15. Rfd1 Re8 16. Qa5 Qf6 17. Na4 Rf8 18. Rd2 Ng4 19. Rad1 Nxf2 20. Nc5
Nxd1 21. Nxe6 *
Position (FEN): 2k2r2/1pp5/p1p1Nqp1/Q5p1/4P3/8/PPPR2PP/3n2K1 b - - 0 21
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1193
Best move: Qf1#