Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bf4 e6 3. Nf3 d5 4. Nbd2 Bd6 5. Bxd6 Qxd6 6. c3 O-O 7. e3 Nbd7 8.
Bd3 e5 9. dxe5 Nxe5 10. Nxe5 Qxe5 11. Nf3 Qe7 12. O-O c6 13. Qc2 Ne4 14. Bxe4
Qxe4 15. Qxe4 dxe4 16. Nd2 f5 17. Rfd1 Be6 18. b3 Rfd8 19. Nf1 Rd3 20. Rxd3
exd3 21. Rd1 Rd8 22. Nd2 b6 23. Nf3 Rd5 24. Nd4 Bf7 25. c4 Rd6 26. Nxf5 Rd7 27.
Nd4 Bg6 28. Nxc6 d2 29. Ne5 Bc2 30. Ra1 d1=Q+ 31. Rxd1 *
Position (FEN): 6k1/p2r2pp/1p6/4N3/2P5/1P2P3/P1b2PPP/3R2K1 b - - 0 31
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 807
Best move: Rxd1#