Solution
51… ♜b6+ 52. ♚g7 ♜xg6+ 53. ♚xg6 a4 54. ♞f5 a3
The position
This advanced puzzle (rating 1842) asks Black to move to find the winning idea. It features these themes: Quiet Move.
It is Black 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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