Solution
55… ♞f6+ 56. ♚g6 ♞xd7 57. a5 d5 58. a6 d4 59. a7 ♞b6
The position
This advanced puzzle (rating 2113) asks Black to move to find the winning idea. It features these themes: Fork, Quiet Move.
It is Black to move. Look for the tactic hiding in the position — Fork, 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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