Solution
37… ♝d4 38. ♜b8+ ♝e8 39. ♜xe8+ ♚f7 40. ♚f1 ♝xe3 41. ♜xe3 c1=♛+
The position
This advanced puzzle (rating 2133) asks Black to move to find the winning idea. It features these themes: Promotion, Sacrifice.
It is Black to move. Look for the tactic hiding in the position — Promotion, Sacrifice. 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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