Solution
39… h5+ 40. ♚h3 ♞f4+ 41. ♚g3 h4+ 42. ♚g4 f5#
The position
This intermediate puzzle (rating 1622) asks Black to move to find the winning idea. It features these themes: Mate in 4.
It is Black to move. Look for the tactic hiding in the position — 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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