Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a number puzzle in which the numbers 1 through 9 must be placed into a grid of cells so that each row or column contains only one of each number

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[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 Wiktionary, Creative Commons Attribution/Share-Alike License

Japanese 数独 (sūdoku), numbers singly

Examples

  • Logic games are popular in Japan largely due to the work of Nikoli, which was founded 27 years ago, but sudoku is the only one known abroad.

    Sudoku Godfather

  • Logic games are popular in Japan largely due to the work of Nikoli, which was founded 27 years ago, but sudoku is the only one known abroad.

    Archive 2007-06-01

  • For everybody who wants to try out something new in sudoku, try shendoku, using the sudoku rules but playing two people, one against the other, like battleshipps.

    Sudoku Godfather

  • So I will post two links a day, one to the daily killer, and one to an interactive plain sudoku on the same site (as you can't get an interactive killer free on that site).

    sudoku

  • Today's Times killer sudoku is a real killer, I only managed to put in three "2" s today.

    sudoku

  • Though the name, sudoku, is Japanese, the puzzle itself was invented long ago in Switzerland.

    Sudoku – Simply addictive » Japundit Blog

  • Though the name, sudoku, is Japanese, the puzzle itself was invented long ago in Switzerland.

    2005 June » Japundit Blog

  • Print, play and solve word sudoku to learn English.

    We Blog A Lot

  • Microsoft says it's added "nearly 100" titles, courtesy of its Microsoft Games division, but many searches I tried ( "sudoku," "checkers," "Risk") didn't pan out.

    Bing adds music, videos, games

  • Microsoft says it's added "nearly 100" titles, courtesy of its Microsoft Games division, but many searches I tried ( "sudoku," "checkers," "Risk") didn't pan out.

    Faster Forward: Bing adds music, videos, games

Comments

New comments are temporarily disabled while we update our database.

  • A distraction from Wordie.

    November 4, 2007

  • My wife is addicted to this. I regard it as The Spawn of the Devil.

    November 4, 2007

  • She probably feels the same way about Wordie :P

    November 5, 2007

  • You may have a point there!

    November 5, 2007

  • I like Sudoku. Not that it's the greatest thing ever, but it's a fun way to pass the time when you're bored..

    November 6, 2007

  • the president tries his hand at sudoku

    January 28, 2008

  • Excellent!

    January 28, 2008

  • It's taken me this long to find out what the word comes from. It's a contraction suu-doku "single digits" of the phrase suuzi-wa dokusin-ni kagiru "the digits are restricted to single" ("digit-TOPIC single-TO restrict" – with dokusin meaning "single" as in "unmarried", a little oddly).

    It began as an American puzzle called Number Place; a Japanese company later issued it as Sudoku, a trade mark in Japan, where it is generically known as nanpure, a contraction of the English name.

    June 3, 2009