Solution
51… ♜a3+ 52. ♚f4 ♜b3 53. ♜xb3 ♚xb3
The position
This intermediate puzzle (rating 1493) asks Black to move to find the winning idea. It features these themes: Tactics.
It is Black to move. Look for the tactic hiding in the position — Tactics. 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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