Solution
21. ♜xa7 ♜d7 22. ♜a8+ ♚c7 23. ♜xg8
The position
This advanced puzzle (rating 1932) asks White to move to find the winning idea. It features these themes: Skewer, Middlegame.
It is White to move. Look for the tactic hiding in the position — Skewer, Middlegame. 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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