a puzzle typically consisting of a large grid of 81 squares (9 across and 9 down) subdivided into 9 smaller grids of 9 squares (3 across and 3 down), with each of the squares to be filled in with the numbers 1 through 9 without repeating a number in any of the large grid's rows, columns, or smaller grids
Origin of SudokuJapanese ; from sū, number + doku, single
A puzzle in which a grid consisting of several regions is to be filled with numbers so that every row, column, and region contains only one instance of each number. The most common format is a grid of nine rows and columns that are divided into nine smaller regions of three rows and three columns into which the numbers 1 through 9 must be placed.
Origin of sudokuJapanese 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.
- (games, puzzles) A type of puzzle whose completion requires each of typically nine rows and columns and each of as many usually square subregions to contain, without duplication, 1 up to 9 or the grid dimension.
Japanese æ•°ç‹¬ (sÅ«doku), numbers singly