Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. c3
Na5 9. Bc2 c5 10. Qe2 O-O 11. Rd1 Nc6 12. d4 exd4 13. cxd4 Nb4 14. dxc5 Nxc2
15. cxd6 Nxa1 16. e5 Bg4 17. dxe7 Qxe7 18. Bg5 Bxf3 19. gxf3 Rfd8 20. Re1 Qc5
21. Nc3 Re8 22. Rxa1 Nd5 23. Ne4 Qc4 24. Qxc4 bxc4 25. Rd1 Rxe5 26. Bh4 Nb4 27.
Rd4 Nd3 28. b3 Nf4 29. Rxc4 f5 30. Nf6+ gxf6 31. Rxf4 Kf7 32. Kg2 Rc8 33. Ra4
a5 34. Bg3 Rd5 35. h4 h5 36. Bf4 Rg8+ 37. Kh2 Rc8 38. Be3 Rc2 39. f4 Rd3 40.
Kg3 Rd5 41. Kf3 Ke6 42. Bb6 Rd3+ 43. Kg2 Rdd2 44. Rxa5 Rxa2 45. Rb5 Rab2 46. b4
Rd5 47. Bc5 Rb3 48. Rb6+ Kf7 49. Rb7+ Ke6 *
Position (FEN): 8/1R6/4kp2/2Br1p1p/1P3P1P/1r6/5PK1/8 w - - 7 50
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 690
Best move: Re7#