Trefoil100

Trefoil100 is a dataset to test knot untangling algorithms, i.e., highly-tangled configurations that can be difficult to smooth out into a canonical knot embedding. Trefoil100 contains 100 tangled embeddings of the trefoil knot.

Source: http://www.cs.cmu.edu/~kmcrane/Projects/RepulsiveCurves/index.html

Image source: http://www.cs.cmu.edu/~kmcrane/Projects/RepulsiveCurves/index.html