Chess puzzle (Checkmate)
Moves: 1. d4 b6 2. e4 Bb7 3. Nc3 e6 4. Nf3 Bb4 5. Bd3 h6 6. Bd2 g5 7. Ne5 d6 8. Ng4 h5
9. Ne3 g4 10. h3 Nf6 11. hxg4 h4 12. g5 Bxc3 13. Bxc3 Nxe4 14. Bxe4 Bxe4 15.
Qg4 Bg6 16. O-O-O d5 17. Rxh4 Rg8 18. Re1 Qd7 19. f4 Nc6 20. f5 exf5 21. Nxf5+
Kd8 22. Nh6 Qxg4 23. Nxg4 Kc8 24. Nf6 Rd8 25. Rh6 Kb7 26. Rh4 b5 27. Rf4 a5 28.
Ng4 b4 29. Bd2 Rh8 30. Ne5 Rae8 31. Nxg6 Rxe1+ 32. Bxe1 fxg6 33. c3 Rh1 34. Kd1
Rg1 35. g3 Ne7 36. Rf6 Nf5 37. Rxg6 Nxg3 38. Re6 Ne4 39. g6 Ng5 40. Re7 Nf3 41.
g7 Nxe1 42. Rxe1 Rxg7 43. Kc2 Rg2+ 44. Kb3 Kb6 45. Re6+ Kb5 46. a4+ bxa3 47.
bxa3 *
Position (FEN): 8/2p5/4R3/pk1p4/3P4/PKP5/6r1/8 b - - 0 47
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 990
Best move: a4#