Solution
40. ♝f4+ ♚c8 41. ♜c1 ♚d8 42. ♜xc2
The position
This advanced puzzle (rating 1929) asks White to move to find the winning idea. It features these themes: Clearance.
It is White to move. Look for the tactic hiding in the position — 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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