String puzzle
In a string puzzle you have to manipulate a piece of string or rope in a certain way. Usually this involves disentanglement of a knot or the creation of a knot or both.
Surely the most famous string puzzle is the Gordian Knot, which Alexander The Great solved using brute force by severing it with his sword.
Examples of string puzzles
Knot : puzzle computer game Knot II : puzzle computer game Knot III : puzzle computer game