◇ Just watch — no move needed
With no friendly stone waiting on the escape path, this first-line ladder is guaranteed: each atari from the second line forces one crawl along the edge, and the runner runs out of board before it runs out of chase. Watch the rhythm — three ataris, three crawls, and the corner closes the account.
Black to play — click the board to guess the next move, or press ▶ to reveal it.