Solution
51. ♜xa3 c1=♛ 52. ♜a8+ ♚c7 53. ♜xg8 ♛a3+ 54. ♚xg4
The position
This expert puzzle (rating 2235) asks White to move to find the winning idea. It features these themes: Skewer.
It is White to move. Look for the tactic hiding in the position — Skewer. 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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