Solution
40. g5 e2 41. g6 ♜f3+ 42. ♚g2 ♜xc3 43. ♚f2 ♜e3 44. ♚e1
The position
This expert puzzle (rating 2235) asks White to move to find the winning idea. It features these themes: Sacrifice, Quiet Move.
It is White to move. Look for the tactic hiding in the position — Sacrifice, Quiet Move. 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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