Solution
18. ♜xb2 ♜xb2 19. ♜a8+ ♛f8 20. ♜xf8+
The position
This intermediate puzzle (rating 1569) asks White to move to find the winning idea. It features these themes: Middlegame.
It is White to move. Look for the tactic hiding in the position — 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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