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The Crozzle, a complex crossword variant, is described. Algorithms to generate solutions to the constrained and unconstrained crossword puzzle problems are described, moMkd and applied to the Crozzle. 'fhe properties of the Crozzle gleaned from these efforts are described. The efforta of human solvers are also described, Automated solution scores generated are compared to the score of the solutions produced by humans, Three data seta are presented as test-beds for future research efforts, It is not yet clear that the Crozzle problem is solvable.
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Forster et al. (1992) studied this question.