Other Word Forms of Sudoku
Origin of Sudoku
Japanese sūdoku contraction of sū(ji wa) doku(shin ni kagiru) the numbers are limited to a single occurrence (the phrase under which sudokus appeared in a magazine which popularized them in Japan in the 1980s) sū(ji) number doku(shin) single
From American Heritage Dictionary of the English Language, 5th Edition
Japanese 数独 (sūdoku), numbers singly
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