sudoku

Definitions

  • (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.

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Wordnet definitions

  • (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

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Wikipedia

Sudoku (数独, sūdoku, digit-single) (, , , originally called Number Place) is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called \"boxes\", \"blocks\", or \"regions\") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.
Completed games are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single integer may not appear twice in the same row, column, or any of the nine 3×3 subregions of the 9x9 playing board.
French newspapers featured variations of the puzzles in the 19th century, and the puzzle has appeared since 1979 in puzzle books under the name Number Place. However, the modern Sudoku only started to become mainstream in 1986 by the Japanese puzzle company Nikoli, under the name Sudoku, meaning \"single number\". It first appeared in a US newspaper and then The Times (London) in 2004, from the efforts of Wayne Gould, who devised a computer program to rapidly produce distinct puzzles.

Example Sentences

  • 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.

  • 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.

  • 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).

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

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

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