Chess puzzle (Checkmate)
Moves: 1. Nf3 b6 2. g3 Bb7 3. Bg2 g6 4. O-O Bg7 5. d4 Nf6 6. b3 O-O 7. Bb2 d6 8. Nbd2
Nbd7 9. c4 e5 10. dxe5 Ng4 11. Qc1 dxe5 12. h3 Nh6 13. e4 Nc5 14. Qc2 Qd3 15.
Qxd3 Nxd3 16. Bc3 Rfd8 17. Rfd1 f6 18. Bf1 Rd7 19. Ne1 Nxe1 20. Rxe1 Rad8 21.
Rad1 Nf7 22. Be2 Ng5 23. Bg4 Rd3 24. Nf1 Nxe4 25. Bb2 Ng5 26. Nh2 f5 27. Rxd3
Rxd3 28. h4 Ne4 29. Bf3 Rd2 30. Bxe4 Bxe4 31. Bc3 Rc2 32. Ba1 Bf8 33. f3 Bc5+
34. Kh1 Bc6 35. Bxe5 Bf2 36. Rf1 Bxg3 37. Bxg3 Rxa2 38. Rf2 Ra1+ 39. Kg2 Rb1
40. Bxc7 Rxb3 41. Be5 a5 42. Rd2 a4 43. Rd6 Be8 44. Rd8 Kf7 45. Rb8 a3 46. c5
b5 47. Rb7+ Ke6 48. f4 a2 49. Ra7 Kd5 50. Rxa2 Bc6 51. Kf2 Kxc5 52. Rc2+ Kd5
53. Rd2+ Ke4 54. Nf1 Rf3+ 55. Ke2 Rd3 56. Ng3+ Rxg3 *
Position (FEN): 8/7p/2b3p1/1p2Bp2/4kP1P/6r1/3RK3/8 w - - 0 57
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 525
Best move: Rd4#