Solution
53. d6+ ♚d7 54. ♚d5 a5 55. ♚c5 b4 56. axb4 a4 57. ♚xc4
The position
This expert puzzle (rating 2244) asks White to move to find the winning idea. It features these themes: Pawn Endgame.
It is White to move. Look for the tactic hiding in the position — Pawn Endgame. Drag a piece on the board to play your move; the puzzle will tell you if you found the best continuation.
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