Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bf4 d5 3. e3 c5 4. c3 Nc6 5. Nd2 Bf5 6. Ngf3 e6 7. Qb3 Qc8 8. Nh4
Bg6 9. Nxg6 hxg6 10. h3 Qd7 11. Nf3 cxd4 12. exd4 a6 13. Bd3 Bd6 14. Be5 O-O
15. O-O b5 16. a3 Rfc8 17. Rfe1 Qc7 18. Qc2 Nd7 19. Bxg6 fxg6 20. Qxg6 Bxe5 21.
Qxe6+ Kh8 22. dxe5 Re8 23. Qg6 Nf8 24. Qh5+ Kg8 25. Ng5 Rxe5 26. Rxe5 Nxe5 27.
Re1 Nf7 28. Ne6 Nxe6 29. Qxd5 Rd8 30. Qxe6 Qd6 31. Qxd6 Rxd6 32. Re8+ Kh7 33.
Ra8 Ne5 34. Kf1 Nd3 35. b3 Nc1 36. b4 *
Position (FEN): R7/6pk/p2r4/1p6/1P6/P1P4P/5PP1/2n2K2 b - - 0 36
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 521
Best move: Rd1#