Solution
37. ♛d5+ ♚g7 38. h6+ ♚h8 39. ♛d4 ♛f1+ 40. ♚a2
The position
This expert puzzle (rating 2294) 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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