Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. Bb5+ Nc6 5. Nf3 Qb6 6. Nc3 a6 7. Bxc6+ bxc6 8.
Na4 Qb4+ 9. c3 Qb5 10. b3 Bf5 11. Nxc5 e6 12. a4 Qb6 13. Be5 Bxc5 14. dxc5 Qxc5
15. Bxf6 gxf6 16. Qd4 Qa5 17. b4 Qd8 18. O-O Bg6 19. Qc5 Qd7 20. Rfd1 O-O-O 21.
b5 a5 22. bxc6 Qc7 23. Rab1 Bxb1 24. Rxb1 Rd6 25. Nd4 Re8 26. Nb5 Rxc6 27. Na7+
Kd7 28. Nxc6 Qxc6 29. Qxa5 Rg8 30. Rb6 Ra8 31. Qb5 Qxb5 32. axb5 *
Position (FEN): r7/3k1p1p/1R2pp2/1P1p4/8/2P1P3/5PPP/6K1 b - - 0 32
Black to move.
Themes:  Endgame, Rook Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 471
Best move: Ra1#