Untangle

most tangles are not knots. pull.

a real chain of points, tangled in itself - pull the loose end and the crossings let go one at a time, unless it is one of the one-in-three that is a genuine knot: pull that and it only cinches tighter, until you feed some slack back in

Most of what looks like a tangle here really is just a tangle — pull and the crossings let go one by one. But roughly one in three is an actual knot, and pulling a knot only cinches it tighter; the only way out is to feed slack back in, not pull harder.

Concepts: order, knots.

An interactive you play with one thumb, on Wundr.