Solution
40. b6 ♚d8 41. b7 e2+ 42. ♚e1 f2+ 43. ♚xe2 f1=♛+ 44. ♚xf1
The position
This intermediate puzzle (rating 1579) 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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