Solution
40… ♝b3+ 41. ♚d2 ♛b4+ 42. ♚xd3 ♛d4+ 43. ♚e2 ♝d1+ 44. ♚f2 ♝xf3
The position
This expert puzzle (rating 2290) asks Black to move to find the winning idea. It features these themes: Skewer, Pin.
It is Black to move. Look for the tactic hiding in the position — Skewer, Pin. 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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