Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. Bc4 Be7 8. Bb3
O-O 9. f3 b5 10. Qd2 Bb7 11. h4 Nh5 12. g4 Nf6 13. Bxe6 Nc6 14. Bb3 Nxd4 15.
Qxd4 h6 16. Be3 d5 17. exd5 Nd7 18. g5 Bc5 19. Qf4 Bxe3 20. Qxe3 Re8 21. Ne4
Ne5 22. O-O-O Nc4 23. Bxc4 bxc4 24. Qd4 Rc8 25. gxh6 f6 26. Rhg1 Re7 27. Nxf6+
Kf8 28. hxg7+ Rxg7 29. Rxg7 Kxg7 30. Rg1+ Kf7 31. Nh5 Qf8 32. Qf6+ Ke8 33. Re1+
Kd7 34. Qe6+ Kc7 35. d6+ Kb8 36. d7 Rd8 37. Qe5+ Ka8 38. Qc7 Qh6+ 39. Kb1 Qf8
40. Re8 Rxe8 41. dxe8=Q+ Qxe8 42. f4 *
Position (FEN): k3q3/1bQ5/p7/7N/2p2P1P/8/PPP5/1K6 b - - 0 42
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 563
Best move: Qe1#