author Lee Haywood number of levels 107 file  SokEvo.txt send mail to author sokoban@dsl.pipex.com visit web site http://www.deth.dsl.pipex.com/sokoban.html view level graph description The SokEvo collection of Sokoban puzzle designs were generated by a program that used random numbers and a solving program to 'evolve' them, primarily using the least number of moves required to solve a design as its fitness value.