Chess puzzle (Checkmate)
Moves: 1. e4 Nf6 2. Nc3 e6 3. Nf3 d5 4. exd5 exd5 5. d4 c6 6. Be3 Bd6 7. Be2 Bf5 8.
Qd2 O-O 9. O-O-O b5 10. Nh4 Bd7 11. Bg5 b4 12. Na4 Qa5 13. b3 Ne4 14. Qe3 Nxg5
15. Qxg5 f6 16. Qe3 Re8 17. Qd3 Bf4+ 18. Kb1 c5 19. Nxc5 Bc6 20. g3 Bd6 21. Nf5
Bxc5 22. dxc5 Qxc5 23. h4 Nd7 24. Rhe1 Ne5 25. Qd2 a5 26. f4 Nf7 27. Bf3 a4 28.
Rxe8+ Rxe8 29. Bxd5 Bxd5 30. Qxd5 Qxd5 31. Rxd5 Re1+ 32. Kb2 *
Position (FEN): 6k1/5npp/5p2/3R1N2/pp3P1P/1P4P1/PKP5/4r3 b - - 2 32
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1255
Best move: a3#