Knot Lab

Untie as many knots as you can. Every round deals a new knot from the Rolfsen table, with its own stiffness and thickness. Click a strand to grasp it, drag to move it, release to put it down; a knot counts as untied when the rope no longer crosses itself. Switch on SA-CBF for the assisted mode from AssistDLO: a click near the rope guides the gripper onto it, and a click away from the rope keeps the gripper up.

This round:

Assistance
Knot tied Crossings 3 Grasps 0 Misses 0 Time 0.0 s

Leaderboard

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#PlayerPointsUntiedHardestBest time

Points per untied knot: 10 for every crossing it started with, up to as many again for speed. "Hardest" is the most crossings you have untied.

What is recorded. Your username is shown on the public leaderboard, so pick one that is not your real name if you prefer. When you untie a knot, the run is saved with your username: the rope's shape over time, where you pointed and grasped, the gripper's motion, the assistance mode you used, and the timing. Runs you do not finish are not kept. Nothing else is collected (no email, no name, no location). The runs are used for research on robot rope manipulation, for example to train imitation-learning models, and may be shared in anonymised form. The background music is streamed from YouTube once you start; while it is switched off, nothing is loaded from YouTube.