Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. Qb3 O-O 6. Ng5 Qe7 7. Qc2 h5 8. b4
Bb6 9. a4 a6 10. a5 Ba7 11. O-O g6 12. d3 Ne8 13. Qe2 Nd6 14. Bd5 b6 15. Qf3
bxa5 16. Bxc6 dxc6 17. Rxa5 Bg4 18. Qg3 Bb6 19. Rxe5 Qf6 20. c4 Be2 21. c5 Bxf1
22. Kxf1 Bxc5 23. Rxc5 Qa1 24. Nd2 Nb5 25. Nb3 Qa4 26. d4 Nxd4 27. Nxd4 *
Position (FEN): r4rk1/2p2p2/p1p3p1/2R3Np/qP1NP3/6Q1/5PPP/2B2K2 b - - 0 27
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1171
Best move: Qd1#