Solution
21… ♞e5 22. ♜af1 ♞xd3 23. ♜xf2 ♞xf2
The position
This advanced puzzle (rating 1969) asks Black to move to find the winning idea. It features these themes: Middlegame, Pin.
It is Black to move. Look for the tactic hiding in the position — Middlegame, 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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