Solution
55… c1=♛ 56. ♚f6 ♛xd2
The position
This beginner puzzle (rating 858) asks Black to move to find the winning idea. It features these themes: Promotion, Pin.
It is Black to move. Look for the tactic hiding in the position — Promotion, 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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