Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 e6 6. Bf4 Bd6 7. O-O-O Nc6 8.
Nb5 Bxf4+ 9. Qxf4 Nd5 10. Qg3 O-O 11. Nf3 a6 12. Nc3 Nxc3 13. bxc3 b5 14. h4
Ne7 15. h5 Nf5 16. Qe5 Qd5 17. Qxd5 exd5 18. Re1 Be6 19. g4 Ng3 20. Rg1 Ne4 21.
Kb2 a5 22. Bd3 Nd6 23. Ng5 Bd7 24. Bxh7+ Kh8 25. Bd3 f6 26. Nh3 Rfe8 27. Ref1
Nc4+ 28. Ka1 Nd2 29. Rf2 Nc4 30. Nf4 Bxg4 31. Bxc4 bxc4 32. Rxg4 Re1+ 33. Kb2
a4 34. Nxd5 *
Position (FEN): r6k/2p3p1/5p2/3N3P/p1pP2R1/2P5/PKP2R2/4r3 b - - 0 34
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1555
Best move: a3#