Solution
47. ♜1h7+ ♚f6 48. ♜f8+ ♚e6 49. f5+ ♚d6 50. ♜d8#
The position
This advanced puzzle (rating 2058) asks White to move to find the winning idea. It features these themes: Fork, Mate in 4.
It is White to move. Look for the tactic hiding in the position — Fork, Mate in 4. 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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