CONCEPTIS HITORI
] No number appears in a row or column more than once.
] Shaded (black) squares do not touch each other vertically or horizontally.
] When completed, all un-shaded (white) squares create a single continuous area.
] No number appears in a row or column more than once.
] Shaded (black) squares do not touch each other vertically or horizontally.
] When completed, all un-shaded (white) squares create a single continuous area.