Solution
42. f5 gxf5 43. gxf5 b4 44. f6 b3 45. f7 b2 46. f8=♛+
The position
This intermediate puzzle (rating 1513) 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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