Solution
44. f6 b4 45. ♝f4 b3 46. axb3 cxb3 47. ♝xd6 b2 48. f7 b1=♛ 49. f8=♛
The position
This expert puzzle (rating 2253) asks White to move to find the winning idea. It features these themes: Promotion.
It is White to move. Look for the tactic hiding in the position — Promotion. 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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