Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. e4 d5 3. e5 c5 4. c3 Nc6 5. Be3 Qb6 6. Qd2 cxd4 7. cxd4 Bd7 8. a3
a5 9. Nc3 a4 10. Nf3 Na5 11. Rb1 Nb3 12. Qd1 Ne7 13. Be2 Nf5 14. O-O Nxe3 15.
fxe3 Be7 16. Bd3 f6 17. Qe2 O-O 18. Bb5 Bc6 19. Bxc6 bxc6 20. Nd2 c5 21. Nxb3
axb3 22. dxc5 Bxc5 23. exf6 Bxe3+ 24. Kh1 Rxf6 25. Rxf6 gxf6 26. Re1 d4 27. Ne4
f5 28. Nf6+ Kg7 29. Nh5+ Kh8 30. Qc4 Qd6 31. Qxb3 Rb8 32. Qd3 Qe5 33. b4 h6 34.
Rf1 Qe4 35. Qxe4 fxe4 36. Ng3 Ra8 37. Ra1 Kg7 38. Nxe4 Kg6 39. a4 Kf5 40. Nd6+
Ke5 41. Nc4+ Ke4 42. Nxe3 Kxe3 43. Kg1 d3 44. Kf1 d2 45. Ra3+ Kd4 46. Ke2 Kc4
47. b5 Rd8 48. Kd1 Kb4 49. Ra2 Kc3 50. b6 e5 51. a5 e4 52. b7 e3 53. a6 Kd3 54.
Rxd2+ exd2 55. a7 Re8 56. b8=Q *
Position (FEN): 1Q2r3/P7/7p/8/8/3k4/3p2PP/3K4 b - - 0 56
Black to move.
Themes:  Endgame, Queen and Rook Endgame Mate in 1 
Puzzle rating: 1053
Best move: Re1#