Solution
27. ♜xb7 bxa2 28. ♜b1 a1=♛ 29. ♜xa1 ♜xa1+ 30. ♚g2
The position
This advanced puzzle (rating 2182) asks White to move to find the winning idea. It features these themes: Quiet Move.
It is White to move. Look for the tactic hiding in the position — Quiet Move. 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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