Chess puzzle (Advantage)
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Nc6 6. Bd3 Bd7 7. O-O cxd4 8. cxd4
Nxd4 9. Nxd4 Qxd4 10. Nc3 Qxe5 11. Re1 Qd6 12. Nb5 Qb8 13. Bf4 Qc8 14. Rc1 Bc6
15. Nc7+ Kd8 16. Nxa8 Qxa8 17. Qg4 Nf6 18. Bg5 Be7 19. Qh4 h6 20. Bxf6 Bxf6 21.
Qb4 a5 22. Qb6+ Kd7 23. h3 Bd8 24. Qd4 Bf6 25. Qb6 Bd8 26. Qb3 Qa7 27. Bb5 Qb6
28. Bxc6+ bxc6 29. Qc2 Bf6 30. b3 Rc8 31. Qc5 Qxc5 32. Rxc5 Ra8 33. Rec1 Ra6
34. a4 Bd4 35. R5c2 Rb6 36. Rd1 c5 37. Rd3 e5 38. Kf1 e4 39. Rg3 g5 40. Ke2 f5
41. f3 Be5 42. f4 Bxf4 43. Rgc3 Bd6 44. Rd2 d4 45. Rc4 Rxb3 46. Ra2 Kc6 47. Kd1
Kd5 48. Rac2 d3 49. R2c3 Rxc3 50. Rxc3 c4 51. Rc1 Kd4 52. Rb1 Bb4 53. Rxb4 axb4
54. a5 Kc5 55. a6 Kb5 *
Position (FEN): 8/8/P6p/1k3pp1/1pp1p3/3p3P/6P1/3K4 w - - 1 56
White to move.
Themes: Advanced Pawn Endgame, Pawn Endgame  
Puzzle rating: 721
Best move: a7