Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bf4 d5 3. e3 Bg4 4. Nf3 e6 5. Nbd2 Bd6 6. h3 Bf5 7. Ne5 O-O 8. g4
Bg6 9. h4 h6 10. Nxg6 fxg6 11. g5 Bxf4 12. gxf6 Bd6 13. fxg7 Kxg7 14. Qg4 Qf6
15. f4 c5 16. c3 cxd4 17. cxd4 h5 18. Qg2 Nc6 19. a3 Bxf4 20. exf4 Nxd4 21. Bd3
Rac8 22. Rg1 Nc2+ 23. Bxc2 Rxc2 24. Qg5 Qxg5 25. fxg5 Rxb2 26. Rb1 Rxb1+ 27.
Nxb1 Rf4 28. Rh1 e5 29. Ke2 d4 30. Nd2 e4 31. Nc4 Rg4 32. Rh2 Rg3 33. Rf2 Rc3
34. Nd6 Rxa3 35. Rf7+ Kg8 36. Rxb7 Ra2+ 37. Ke1 e3 38. Ne4 d3 39. Nf6+ Kf8 40.
Rd7 *
Position (FEN): 5k2/p2R4/5Np1/6Pp/7P/3pp3/r7/4K3 b - - 3 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1546
Best move: Ra1#