Disentanglement puzzle

For puzzles of this kind, the goal is to disentangle a metal or string loop from an object. Topology plays an important role with these puzzles. Vexiers are a different sort of disentanglement puzzle – two or more metal wires, which have been intertwined, are to be untangled. They, too, spread with the general puzzle craze at the end of the 19th century. A large number of the Vexiers still available today originate in this period. So-called ring puzzles, of which the Chinese rings are part, are a different type of Vexier. In these puzzles a long wire loop must be unsnarled from a mesh of rings and wires. The number of steps required for a solutio