Solution
49. g7 ♞d3+ 50. ♚e3 ♚xg7 51. ♚xd3 ♚f6 52. ♚d4
The position
This intermediate puzzle (rating 1577) asks White to move to find the winning idea. It features these themes: Knight Endgame.
It is White to move. Look for the tactic hiding in the position — Knight 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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