hitori

This programs solves existing Hitori puzzles as well as creates new ones. Hitori is mathematical game where a square grid is filled with numbers.

Some numbers in a row or a column are duplicated. The object of the game is to locate these duplicates and mark them blank, given the following three rules:
-Numbers may never appear more than once in each row or column
-Black cells are never adjacent in a row or a column
-Empty cells create a single continuous area, undivided by black cells
-This program has a puzzle size limitation of maximum 17 rows and 17 columns.