Solution
30. ♜a8 ♜c8 31. ♜xc8 ♛xc8 32. ♜a8 ♛xa8 33. ♛xa8+
The position
This intermediate puzzle (rating 1675) asks White to move to find the winning idea. It features these themes: Pin, Clearance.
It is White to move. Look for the tactic hiding in the position — Pin, 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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