Solution
39. h5 gxh5 40. g5 hxg5 41. fxg5 b4 42. axb4
The position
This advanced puzzle (rating 2034) asks White to move to find the winning idea. It features these themes: Pawn Endgame.
It is White to move. Look for the tactic hiding in the position — Pawn Endgame. 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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