Solution
40… ♛f4+ 41. g3 ♛xf2#
The position
This easy puzzle (rating 1001) asks Black to move to find the winning idea. It features these themes: Mate in 2.
It is Black to move. Look for the tactic hiding in the position — Mate in 2. 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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