Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 O-O 8.
Bb3 Re8 9. f3 e6 10. Qd2 d5 11. O-O-O Nxd4 12. Bxd4 e5 13. Bc5 d4 14. Nd5 Be6
15. Nxf6+ Bxf6 16. Kb1 a5 17. f4 a4 18. Bxe6 Rxe6 19. fxe5 Bxe5 20. Bxd4 Rd6
21. c3 a3 22. b3 Qe7 23. Qe2 Rad8 24. Qe3 b5 25. Kc2 b4 26. Bxe5 Qxe5 27. Rxd6
Rxd6 28. Rd1 Rc6 29. Qd4 Rxc3+ 30. Kb1 Qxh2 31. Qxb4 Rc8 32. Qd2 Qe5 33. Qd4
Qc7 34. Qd3 Qc5 35. Qd2 h5 36. Rc1 Qf8 37. Rxc8 Qxc8 38. Qb4 Qg4 39. Qb8+ Kh7
40. Qe8 *
Position (FEN): 4Q3/5p1k/6p1/7p/4P1q1/pP6/P5P1/1K6 b - - 5 40
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 892
Best move: Qd1#