sudoku
su·do·ku
noun \sü-ˈdō-kü\Definition of SUDOKU
: a puzzle in which several numbers are to be filled into a 9x9 grid of squares so that every row, every column, and every 3x3 box contains the numbers 1 through 9
Origin of SUDOKU
Japanese sūdoku, short for sūji wa dokushin ni kagiru "the numerals must remain single" (i.e., the digits can occur only once)
First Known Use: 2004
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