Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. Nf3 dxe4 3. Ng5 Bf5 4. Bc4 e6 5. O-O Qxg5 6. d3 Qd8 7. Qh5 Nf6 8.
Qe2 Bd6 9. Bg5 exd3 10. cxd3 O-O 11. Nc3 Nc6 12. Rad1 Qe7 13. Bxf6 Qxf6 14.
Rfe1 Rad8 15. Nb5 a6 16. Nxd6 Rxd6 17. h3 Rfd8 18. g4 Bg6 19. f4 Qxf4 20. Rf1
Qg5 21. Qf3 Ne5 22. Qe2 Nxc4 23. dxc4 Rxd1 24. Rxd1 Rxd1+ 25. Qxd1 Qe3+ 26. Kg2
Qe5 *
Position (FEN): 6k1/1pp2ppp/p3p1b1/4q3/2P3P1/7P/PP4K1/3Q4 w - - 3 27
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 619
Best move: Qd8#