Edge-matching puzzle

Edge-matching puzzle

A edge-matching puzzle is a type of tiling puzzle involving tiling an area with (typically regular) polygons whose edges are distinguished with colours or patterns, in such a way that the edges of adjacent tiles match.

Edge-matching puzzles are believed to be NP-complete, and capable of conversion to and from equivalent jigsaw puzzles and polyomino packing puzzle. cite web
title=Jigsaw Puzzles, Edge Matching, and Polyomino Packing: Connections and Complexity
author=Erik D. Demaine, Martin L. Demaine
accessdate = 2007-08-12

The first edge-matching puzzles were patented in the U.S. by E. L. Thurston in 1892. [cite web
title=Rob's puzzle page: Edge Matching

Current examples of commercial edge-matching puzzles include the Eternity II puzzle, TetraVex, and Kadon Enterprises' range of edge-matching puzzles.

See also

* Domino tiling


External links

* [http://www.stetson.edu/~efriedma/rubik/match/index.html Erich's Matching Puzzles Collection]
* [http://mitglied.lycos.de/polyforms/coloredpolygons/index.html Color- and Edge-Matching Polygons] by Peter Esser
* [http://home.comcast.net/~stegmann/pattern.htm Rob's puzzle page] by Rob Stegmann

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