Solution
21. ♝xf4 gxf4 22. ♜xf4+ ♚e7 23. ♜xg4
The position
This advanced puzzle (rating 2051) asks White to move to find the winning idea. It features these themes: Middlegame, Fork.
It is White to move. Look for the tactic hiding in the position — Middlegame, Fork. 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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