Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. c3 d6 6. Bb3 g5 7. Nbd2 Bg7 8. Nf1
O-O 9. Ne3 Be6 10. Bxe6 fxe6 11. h4 g4 12. Nh2 h5 13. Nhf1 d5 14. Ng3 Qe8 15.
exd5 exd5 16. Nef5 Ne7 17. Nxg7 Kxg7 18. Bg5 Qg6 19. Qd2 Rae8 20. O-O-O c6 21.
f3 Nh7 22. fxg4 hxg4 23. Be3 Nf5 24. Nxf5+ Rxf5 25. Bxa7 Ra8 26. Bc5 Rxa2 27.
Kb1 Ra8 28. Rdf1 e4 29. h5 Rxf1+ 30. Rxf1 Qxh5 31. dxe4 Re8 32. Qd4+ Kg8 33.
exd5 Qg6+ 34. Ka2 cxd5 35. Rf4 Qa6+ 36. Ba3 Qc4+ 37. Qxc4 dxc4 38. Rxg4+ Kf7
39. Rxc4 Re2 40. Rc7+ Kg6 41. g3 Nf6 42. Rxb7 Ne4 43. Rb6+ Kf5 44. Bd6 Nxc3+
45. Ka3 Nd5 46. Rb5 Ke6 47. Bb8 Re3+ 48. Ka4 Re1 49. Ka5 *
Position (FEN): 1B6/8/4k3/KR1n4/8/6P1/1P6/4r3 b - - 9 49
Black to move.
Themes:  Endgame Anastasia's Mate, Mate in 1 
Puzzle rating: 640
Best move: Ra1#