Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 dxc4 3. Nc3 Bf5 4. e4 Bg6 5. Bxc4 e6 6. d5 exd5 7. exd5 Nf6 8.
Nf3 Nbd7 9. O-O Bb4 10. Re1+ Be7 11. Bf4 O-O 12. Nb5 Bd6 13. Nxd6 cxd6 14. Bxd6
Re8 15. Rxe8+ Qxe8 16. Qb3 Nb6 17. Re1 Qd7 18. Be5 Nfxd5 19. Bxd5 Nxd5 20. Rd1
Rc8 21. Bc3 Be4 22. Ne5 Qe6 23. Nf3 Bxf3 24. gxf3 Qg6+ 25. Kf1 Qa6+ 26. Kg1
Nxc3 27. bxc3 Qe2 28. c4 g6 29. a4 Rxc4 30. Rd8+ Kg7 31. Qxb7 Rc2 32. Qxa7 Qxf3
33. Qd4+ Kh6 34. Qe3+ Qxe3 35. fxe3 Ra2 36. Ra8 f5 37. a5 Kg5 38. Ra6 h5 39.
Ra8 h4 40. a6 Kh5 41. a7 Kg5 42. Kf1 Kg4 43. Kg1 g5 44. Kh1 h3 45. Kg1 Kf3 46.
Rf8 *
Position (FEN): 5R2/P7/8/5pp1/8/4Pk1p/r6P/6K1 b - - 3 46
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1217
Best move: Ra1#