Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. Bd3 Nc6 7. Be3 e6 8.
O-O Be7 9. Ne4 Nd5 10. Bf2 Nf4 11. Bb5 O-O 12. c3 e5 13. d5 Nxd5 14. h3 Bh5 15.
Bxc6 bxc6 16. Qa4 Bxf3 17. gxf3 Bh4 18. Qxc6 Bxf2+ 19. Rxf2 Nf4 20. Rd2 Qh4 21.
Rh2 Qh5 22. Rf1 Rab8 23. b3 Rb6 24. Qxc7 Rg6+ 25. Kh1 Ne2 26. Qd7 Qxf3+ 27.
Rxf3 *
Position (FEN): 5rk1/p2Q1ppp/6r1/4p3/4N3/1PP2R1P/P3n2R/7K b - - 0 27
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 957
Best move: Rg1#