Solution
37. c7 ♜g3+ 38. ♚f2 ♜c3 39. ♜ac1 g3+ 40. ♚g1
The position
This advanced puzzle (rating 2163) asks White to move to find the winning idea. It features these themes: Tactics.
It is White to move. Look for the tactic hiding in the position — Tactics. 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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