Solution
49. ♜e3 ♜b2+ 50. ♚f3 ♜xe3+ 51. ♚xe3 ♜c2 52. ♚d4
The position
This advanced puzzle (rating 2181) asks White to move to find the winning idea. It features these themes: Pin.
It is White to move. Look for the tactic hiding in the position — 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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