Solution
48. g6+ ♚f6 49. ♜d6+ ♚e7 50. g7 ♚xd6 51. g8=♛
The position
This advanced puzzle (rating 2186) 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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