Chess puzzle (Checkmate)
Moves: 1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. g3 Nbd7 5. Bg2 e5 6. d3 Be7 7. O-O O-O 8. Bb2
e4 9. dxe4 dxe4 10. Ng5 Re8 11. Nxe4 Nxe4 12. Bxe4 Bf6 13. Bxf6 Qxf6 14. Nd2
Nc5 15. Bg2 Bg4 16. Nf3 Rad8 17. Qc2 Ne4 18. Rad1 Nc3 19. Rxd8 Nxe2+ 20. Kh1
Qxd8 21. Rd1 Qf6 22. Qd3 c5 23. Rd2 Qa1+ 24. Rd1 Qxa2 25. Rd2 Qa1+ 26. Rd1 Qf6
27. Rd2 Nd4 28. Nxd4 cxd4 29. Bxb7 Bh3 30. Rd1 Qxf2 31. Be4 f5 32. Qf3 Qb2 33.
Bd5+ Kh8 34. Qd3 Re2 35. Qxd4 Rxh2+ 36. Kg1 Qe2 37. Bf3 Rg2+ 38. Kh1 Qxf3 *
Position (FEN): 7k/p5pp/8/5p2/2PQ4/1P3qPb/6r1/3R3K w - - 0 39
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 623
Best move: Qd8#