Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Bxd2+
8. Qxd2 Nxe4 9. Bxf7+ Kxf7 10. Qf4+ Nf6 11. O-O Re8 12. d5 Ne7 13. d6 Nd5 14.
Ng5+ Kg8 15. Qg3 cxd6 16. Qxd6 Qb6 17. Qa3 Re2 18. Qd3 Qxb2 19. Na3 Qd2 20. Qf3
Re5 21. Nc4 Qxg5 22. Nxe5 Qxe5 23. Rae1 Qh5 24. Qb3 d6 25. a4 Qf7 26. a5 Nf4
27. Qf3 Ng6 28. a6 Rb8 29. Qd3 Qd5 30. Qb1 b6 31. Rd1 Qa5 32. Qb3+ Kh8 33. Rxd6
Bxa6 34. Rfd1 h6 35. Qg3 Kh7 36. Rxf6 gxf6 37. Qxb8 Qa4 38. Qc7+ Kg8 39. Rd8+
Nf8 40. Qg3+ Kh7 41. Rxf8 *
Position (FEN): 5R2/p6k/bp3p1p/8/q7/6Q1/5PPP/6K1 b - - 0 41
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 618
Best move: Qd1#