IPUZ

IPUZ is intended as an openly-documented format for data files of puzzle games such as crosswords and sudoku. In contrast to "proprietary" formats such as PUZ, there is an official spec available freely and released under a Creative Commons license (BY-ND 3.0), instead of the format having to be discovered by reverse engineering subject to possible hassles by intellectual-property owners.

Official spec

 * IPUZ spec

Sample data

 * IPUZ example