Solution
47. a6 ♚xa6 48. ♚b4 ♞a5 49. ♚c5 ♞c4 50. ♚c6
The position
This advanced puzzle (rating 1895) asks White to move to find the winning idea. It features these themes: Zugzwang.
It is White to move. Look for the tactic hiding in the position — Zugzwang. 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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