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...Your challenge insert a number from to in each cell without repeating any of those digits the same row column or subgrid box solutions moderately dif cult sudoku center and others this article appear at www sciam com along with additional puzzles scientific american copyright inc science behind solving puzzle requires no math not even arithmetic so game poses intriguing mathematical problems by jean paul delahaye ne might expect logic appeal very few diagonals add up sum indeed aside people mathematicians maybe computer geeks numbers grid has almost nothing do compulsive gamblers yet short time magic square but everything latin ohas become extraordinarily popular bringing mind rubik s cube craze early order n is matrix cells on unlike three dimensional puz side lled symbols such that symbol never zle typically it contains nine appears twice sym rows columns divided into smaller bols thus used precisely times origin grids squares containing call them subgrids dates back middle ages late...