Solution
52. ♚b5 ♜c3 53. a6 ♚g3 54. a7
The position
This advanced puzzle (rating 2016) asks White to move to find the winning idea. It features these themes: Rook Endgame.
It is White to move. Look for the tactic hiding in the position — Rook 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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