Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. c4 Bg7 3. Nc3 Nf6 4. Nf3 O-O 5. Bg5 d6 6. e3 c6 7. Be2 a6 8. a4 a5
9. O-O Na6 10. h3 Qc7 11. e4 e5 12. d5 Nc5 13. Qc2 Nh5 14. Qd2 Nb3 15. Qe3 Nxa1
16. Rxa1 f6 17. Bh6 Bxh6 18. Qxh6 Nf4 19. Bf1 f5 20. exf5 Bxf5 21. Kh2 Qg7 22.
Qxg7+ Kxg7 23. Nh4 Bd7 24. g3 Nh5 25. Kg2 c5 26. Ne4 Ra6 27. Nf3 Bxh3+ 28. Kxh3
Rxf3 29. Kg2 Rb3 30. Ra2 Rab6 31. Kg1 Nf6 32. Ng5 Rxb2 33. Ne6+ Kg8 34. Ra1 Rb1
35. Ra2 R6b2 36. Ra3 Rc1 37. Kg2 Rbb1 38. Be2 Ra1 39. Rf3 Ne4 *
Position (FEN): 6k1/1p5p/3pN1p1/p1pPp3/P1P1n3/5RP1/4BPK1/r1r5 w - - 14 40
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 471
Best move: Rf8#