Main Entry: su·do·ku

Pronunciation: \sü-ˈdō-kü\

Function: noun

Etymology: Japanese sūdoku, short for sūji wa dokushin ni kagiru "the numerals must remain single" (i.e., the digits can occur only once)

Date: 2004

: 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