Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. f4 Bc5 5. Nf3 Nf2 6. Qd5 b6 7. Rg1 c6 8. Qd2
Ne4 9. Qc2 Bf2+ 10. Kd1 d5 11. Rh1 O-O 12. e3 Ba6 13. cxd5 Qxd5+ 14. Bd2 Rd8
15. Bxa6 Nxa6 16. Kc1 Nac5 17. Nc3 Nxc3 18. bxc3 Nd3+ 19. Kb1 a5 20. Rd1 a4 21.
a3 Qb5+ 22. Ka2 Qc4+ 23. Kb1 Ra5 24. Ra2 Rb5+ 25. Ka1 Nc5 26. Nd4 Rxd4 27. cxd4
Nb3+ 28. Qxb3 Rxb3 29. Bb4 c5 30. dxc5 bxc5 *
Position (FEN): 6k1/5ppp/8/2p1P3/pBq2P2/Pr2P3/R4bPP/K2R4 w - - 0 31
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 636
Best move: Rd8#