Solution
19. a3 ♜xd1+ 20. ♜xd1 ♝xe4 21. ♛xe4 ♝xa3 22. bxa3
The position
This advanced puzzle (rating 2197) 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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