Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. e5 e6 3. d4 c5 4. c3 cxd4 5. cxd4 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 Ne7 8.
Nf3 f5 9. exf6 gxf6 10. Bb5+ Nbc6 11. Qf4 O-O 12. Bd3 Ng6 13. Qg3 Kh8 14. Bxg6
hxg6 15. Qxg6 Qe7 16. Qh6+ Qh7 17. Qxh7+ Kxh7 18. Nbd2 e5 19. dxe5 fxe5 20.
O-O-O Kg6 21. h4 Kh5 22. Ng5 Bf5 23. f3 Bd3 24. Nf1 Nb4 25. a3 Rac8+ 26. Kd2
Rc2+ 27. Ke3 *
Position (FEN): 5r2/pp6/8/3pp1Nk/1n5P/P2bKP2/1Pr3P1/3R1N1R b - - 4 27
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 853
Best move: d4#