Each puzzle consists of a square grid with numbers appearing in all squares.The object is to shade squares so- No number appears in a row or column more than once.- Shaded (colored) squares do not touch each other vertically or horizontally.- When completed, all un-shaded (white) squares create a single continuous area.details :PPT FILE3 PUZZLE PAGES3 SOLUTIONS PAGES4 GRID PER PAGEHIGH QUALITYFOR THE FULL PRODUCT CLIC HERE : 50 puzzle pages of hitori gameFOLLOW ME FOR MORE PRODUCTS & FREEBIES.