Chess puzzle (Checkmate)
Moves: 1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. d3 Bg7 5. O-O Nf6 6. Nbd2 O-O 7. e4 d6 8. Re1
e5 9. Qe2 Ne8 10. c3 f5 11. exf5 Bxf5 12. Nh4 Be6 13. b3 Qd7 14. Bb2 Bh3 15.
Bxh3 Qxh3 16. Ne4 Qd7 17. d4 cxd4 18. cxd4 exd4 19. Ng5 Nc7 20. Rac1 Rae8 21.
Qc4+ d5 22. Qa4 a6 23. b4 b5 24. Qc2 Rxe1+ 25. Rxe1 Nxb4 26. Qc5 Nd3 27. Qe7
Qxe7 28. Rxe7 Nxb2 29. Rxc7 d3 30. Ngf3 b4 31. Rd7 Bc3 32. Rxd5 Nc4 33. Rxd3 a5
34. Ng5 h6 35. Ne6 Rf6 36. Nc5 g5 37. Ng2 Rc6 38. Ne4 Ne5 39. Rd8+ Kg7 40. h4
Nf3+ 41. Kf1 g4 42. Nf4 Nh2+ 43. Kg2 Nf3 44. Rd7+ Kf8 45. Nh5 Ke8 46. Rh7 Kd8
47. Nhf6 Kc8 48. Nd5 Rc4 49. Nef6 Rc5 50. Nb6+ Kd8 *
Position (FEN): 3k4/7R/1N3N1p/p1r5/1p4pP/2b2nP1/P4PK1/8 w - - 18 51
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1171
Best move: Rd7#