Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. Bf4 Bb4+ 4. Nc3 Nf6 5. a3 Bxc3+ 6. bxc3 O-O 7. cxd5 Nxd5
8. Bd2 b6 9. e4 Nf6 10. Bd3 Bb7 11. f3 c5 12. Be3 cxd4 13. cxd4 Nc6 14. Ne2 h6
15. O-O Qd7 16. Bb5 a6 17. Ba4 b5 18. Bb3 Na5 19. Ba2 Qe7 20. e5 Nd5 21. Bxd5
Bxd5 22. Qd2 Nc4 23. Qd3 Rfc8 24. Rfb1 Nxe3 25. Qxe3 Rc2 26. Rc1 Rac8 27. Rxc2
Rxc2 28. Rc1 Qc7 29. Rxc2 Qxc2 30. Kf2 Bc4 31. f4 Kf8 32. Kf3 Bxe2+ 33. Qxe2
Qb3+ 34. Qe3 Qd1+ 35. Kg3 Ke7 36. h3 a5 37. Qc3 Qa4 38. Qc7+ Kf8 *
Position (FEN): 5k2/2Q2pp1/4p2p/pp2P3/q2P1P2/P5KP/6P1/8 w - - 4 39
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 997
Best move: Qd8#