Solution
18… ♞xe3+ 19. ♚e1 ♞f5 20. ♞g5 ♞xg7
The position
This advanced puzzle (rating 2087) asks Black to move to find the winning idea. It features these themes: Fork, Trapped Piece.
It is Black to move. Look for the tactic hiding in the position — Fork, Trapped Piece. 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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