Chess puzzle (Checkmate)
Moves: 1. c4 c6 2. d4 d5 3. c5 b6 4. b4 a5 5. bxa5 bxc5 6. dxc5 Qxa5+ 7. Bd2 Qxc5 8.
Nc3 Bf5 9. g3 e6 10. Bg2 Nf6 11. Nf3 h6 12. O-O Bd6 13. a4 O-O 14. Rc1 Qb6 15.
Be3 Qa5 16. Nd4 Bg6 17. Bd2 Qc7 18. e3 Qa7 19. Re1 Rc8 20. Ncb5 Qd7 21. Nxd6
Qxd6 22. Nb5 Qd7 23. Nd4 Na6 24. Rc3 Qd6 25. Bf1 Ne4 26. Rb3 Nac5 27. Bb4 Rxa4
28. Bxc5 Nxc5 29. Rb6 Raa8 30. Bb5 Nd7 31. Rxc6 Rxc6 32. Bxc6 Rc8 33. Bxd7 Qxd7
34. Qd2 Be4 35. h4 Qa4 36. f3 Bg6 37. g4 e5 38. h5 Bh7 39. Ne2 Rc2 40. Qxd5 Qa7
*
Position (FEN): 6k1/q4ppb/7p/3Qp2P/6P1/4PP2/2r1N3/4R1K1 w - - 1 41
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 644
Best move: Qd8#