Chess puzzle (Advantage)
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nc3 Bb4 6. Be2 Ne4 7. Bd2 Nxc3 8.
bxc3 Be7 9. c4 Qd8 10. O-O O-O 11. c5 Bf6 12. c3 c6 13. Bd3 Nd7 14. Qc2 g6 15.
Rab1 Re8 16. Rfe1 b6 17. cxb6 axb6 18. Bf4 Bb7 19. Nd2 b5 20. Ne4 Be7 21. Nd6
Bxd6 22. Bxd6 Nf6 23. Be5 Nd7 24. c4 Nxe5 25. dxe5 Qd7 26. cxb5 Red8 27. Red1
Qc7 28. bxc6 Qxc6 29. Qxc6 Bxc6 30. Bc4 Rxd1+ 31. Rxd1 Rb8 32. f4 Rb4 33. Rc1
Rb2 34. Bf1 Bd5 35. a3 Ra2 36. Rc3 h5 37. h3 Ra1 38. Kf2 Ra2+ 39. Kg3 Kg7 40.
Kh2 h4 41. Kg1 Ra1 42. Kf2 Ra2+ 43. Ke3 Bxg2 44. Bxg2 Rxg2 45. Kd4 Ra2 46. Kc5
f6 47. Kb5 fxe5 48. fxe5 Kh6 49. a4 g5 50. Rc4 Kg6 *
Position (FEN): 8/8/4p1k1/1K2P1p1/P1R4p/7P/r7/8 w - - 2 51
White to move.
Themes: Defensive Move Endgame, Rook Endgame  
Puzzle rating: 1243
Best move: a5