Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. g3 Bf5 3. Bg2 Nf6 4. Nf3 e6 5. Nc3 c5 6. Bf4 Nc6 7. Nb5 Rc8 8. a3
a6 9. Nc3 Qb6 10. Na4 Qa5+ 11. Nc3 Qb6 12. Na4 Qa5+ 13. Nc3 Ne4 14. b4 cxb4 15.
axb4 Qxb4 16. Bd2 Nxc3 17. Qc1 Qc4 18. Bf1 Nb5 19. e4 Nbxd4 20. Bxc4 Nxf3+ 21.
Kd1 Bxe4 22. Be2 Nxd2 23. Qxd2 Bxh1 24. Rb1 b5 25. Ra1 Nb4 26. c3 Nc6 27. Rxa6
Bd6 28. Bxb5 Bf3+ 29. Kc1 Kd7 30. Qe3 Ke7 31. Qxf3 Ne5 32. Qe3 Rc5 33. Be2 Rhc8
34. Qg5+ Kf8 35. Kd2 Rxc3 36. Rxd6 Rc2+ 37. Ke3 Nc4+ 38. Bxc4 R2xc4 39. Rd8+
Rxd8 *
Position (FEN): 3r1k2/5ppp/4p3/3p2Q1/2r5/4K1P1/5P1P/8 w - - 0 40
White to move.
Themes:  Endgame, Queen and Rook Endgame Mate in 1 
Puzzle rating: 689
Best move: Qxd8#