Solution
39… ♛e1+ 40. ♚g2 ♝f1+ 41. ♚f3 ♛e2#
The position
This advanced puzzle (rating 1906) asks Black to move to find the winning idea. It features these themes: Mate in 3, Fork.
It is Black to move. Look for the tactic hiding in the position — Mate in 3, Fork. 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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