Solution
58. ♜xa8 e1=♛ 59. ♜f8+ ♚g6 60. a8=♛
The position
This intermediate puzzle (rating 1749) asks White to move to find the winning idea. It features these themes: Promotion, Clearance.
It is White to move. Look for the tactic hiding in the position — Promotion, Clearance. 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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