Solution
65. ♜xf5+ ♚e7 66. ♜xf7+ ♚xf7 67. ♚f5
The position
This intermediate puzzle (rating 1785) 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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