Solution
35. ♝b4 b1=♛+ 36. ♛xb1 ♝xb1+ 37. ♚xb1 ♛xb4+ 38. ♜xb4
The position
This intermediate puzzle (rating 1688) asks White to move to find the winning idea. It features these themes: Pin.
It is White to move. Look for the tactic hiding in the position — Pin. 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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