Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 c6 6. e4 dxe4 7. fxe4 Bg4 8.
Nf3 Nbd7 9. Be2 Qc7 10. O-O e6 11. Bg3 Qd8 12. Ng5 Bxe2 13. Qxe2 h6 14. Nf3 Be7
15. e5 Nd5 16. Ne4 O-O 17. c4 N5b6 18. b3 c5 19. dxc5 Nxc5 20. Nd6 Ncd7 21.
Rad1 Bxd6 22. exd6 Rc8 23. Bh4 Qe8 24. Be7 Rc6 25. Ne5 Nxe5 26. Qxe5 Nd7 27.
Qe3 b6 28. Bxf8 Qxf8 29. Qd4 a5 30. a3 e5 31. Qd5 Qc8 32. Rxf7 Kh8 33. Re7 Nf6
34. Qf7 Qg4 35. Rd2 Qg5 36. Re8+ Nxe8 37. Qxe8+ Kh7 38. Qxc6 Qxd2 39. Qe4+ Kh8
40. Qd5 *
Position (FEN): 7k/6p1/1p1P3p/p2Qp3/2P5/PP6/3q2PP/6K1 b - - 3 40
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1235
Best move: Qe1#