Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Nf3 e6 3. e3 d5 4. Bd3 b6 5. Nbd2 Bb7 6. Qe2 Bd6 7. c3 Nbd7 8. O-O
e5 9. e4 dxe4 10. Nxe4 Nxe4 11. Bxe4 Bxe4 12. Qxe4 O-O 13. dxe5 Re8 14. Qg4
Nxe5 15. Nxe5 Bxe5 16. Bg5 f6 17. Bh6 Re7 18. Rad1 Qe8 19. Be3 Rd8 20. h3 Red7
21. Rxd7 Rxd7 22. Rd1 Rxd1+ 23. Qxd1 Qe6 24. a3 Bd6 25. Qa4 Kf7 26. Qxa7 Qb3
27. Bd4 *
Position (FEN): 8/Q1p2kpp/1p1b1p2/8/3B4/PqP4P/1P3PP1/6K1 b - - 2 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 492
Best move: Qd1#