Chess puzzle (Checkmate)
Moves: 1. e4 d6 2. d4 g6 3. c4 Bg7 4. Nc3 Nf6 5. Nf3 Nc6 6. Be2 O-O 7. O-O e5 8. d5
Ne7 9. b4 a6 10. c5 Ne8 11. Bg5 f6 12. Be3 h6 13. Qd2 Kh7 14. Rad1 f5 15. Nh4
f4 16. Bxf4 Rxf4 17. g3 Rxh4 18. gxh4 Bh3 19. Rfe1 Ng8 20. h5 Bf6 21. hxg6+
Kxg6 22. Kh1 Bg5 23. Rg1 Qf6 24. Rg3 Kf7 25. Bh5+ Ke7 26. Qe2 Bd7 27. Rdg1 Ng7
28. f4 Nxh5 29. fxg5 Nxg3+ 30. Rxg3 hxg5 31. Rf3 Qg7 32. cxd6+ cxd6 33. Nd1 Bg4
34. Ne3 Bxf3+ 35. Qxf3 Rf8 36. Qd1 Nh6 37. Qc1 Kd7 38. a4 Qf6 39. b5 Qf3+ 40.
Ng2 Qf1+ 41. Qxf1 *
Position (FEN): 5r2/1p1k4/p2p3n/1P1Pp1p1/P3P3/8/6NP/5Q1K b - - 0 41
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 680
Best move: Rxf1#