This may happen on the first request due to CSS mimetype issues. Try clearing your browser cache and refreshing.

- “Wire and String Puzzles” in
*Winning Ways for Your Mathematical Plays*(2nd edition) Vol 4 (2004), pp.849-861 by Berlekamp, Conway and Guy. Describes how continuous deformations (homeomorphisms) of space to represent your puzzle differently can help in*finding*solutions. Also available in the original edition. - Structural Topology, a journal of the Structural Topology Research Group at the University of Montreal. The journal ceased publication in 1997. The entire archive is available on-line.
- “Algorithms for Recognizing Knots and 3-Manifolds”, Joel Hass, to appear in
*Chaos, Fractals and Solitons*. - “The Mathematics of a Mechanical Puzzle”, G. C. Shephard, The Mathematical Gazette, Vol. 61, No. 417 (Oct., 1977), pp. 174-178. Presents an analysis of the Chinese Rings puzzle and some variations.
- “A Topological Puzzle”, Inta Bertuccioni, The American Mathematical Monthly, Vol. 110, No. 10 (Dec., 2003), pp. 937-939. Shows the impossiblity of solving the Figure Eight puzzle.
- “Topological insights from the Chinese Rings”, Józef H. Przytycki, Adam S. Sikora, Proceedings of the American Mathematical Society, Vol. 130, No. 3 (Mar., 2002), pp. 893-902. Proves that a particular solution of the Chinese Rings puzzle is the simplest possible.
- “Disentangling topological puzzles by using knot theory”, Matthew Horak, Mathematics Magazine, Vol 79, No. 5, (Dec. 2006), pp. 368-375. Illustrates a method to construct a useful abstraction for solving topological disentanglement puzzles. Uses the Quattro puzzle as a case study.
- “A topological menagerie”, Paul Melvin, the American Mathematical Monthly, Vol. 113, No. 4, pp. 348-351 (2006) (link to preprint at arxiv from 2004). Gives a "more conceptual proof of the impossibility of solving Coffin's [Figure Eight] puzzle".
- “The Odyssey of the Figure Eight Puzzle”, Stewart Coffin in The Mathmagician and the Pied Puzzler, AK Peter’s Publishers, 1999. Presents some of the history behind the Figure Eight puzzle.

“The *Quattro* puzzle”, Jan de Ruiter **40**, p.12-15 (1996 )

“On solving the *Manhattan String Puzzle*”, Jean-Claude Constantin, **63**, p.14-15 (March 2004)

“Variations of a String Puzzle”, Jean-Claude Constantin, **67**, p.21-23 (July 2005)

“Secrets of a Simple Type of String Puzzle”, Lambert Bright, **70**, p.20-21 (July 2006)

“Secrets of *Wit's End*”, Lambert Bright, **71**, p.20-21 (Nov 2006)

“Secrets of *Ball and Chain*”, Lambert Bright, **72**, p.12-13 (March 2007)

Ideas from Rigidity Theory, Knot Theory, String figures, linkages?