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www.websudoku.comSudoku (数独, sūdoku?) listen (help·info) is a logic-based number-placement puzzle. The objective is to fill a 9×9 grid so that each column, each row,
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Wikipedia
Sudoku
From Wikipedia, the free encyclopedia
This article is about the logic puzzle. For the disease, see Sodoku.
A sudoku puzzle...
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Sudoku (数独, sūdoku?) listen (help·info) is a logic-based number placement puzzle. The objective is to fill a 9×9 grid so that each column, each row, and each of the nine 3×3 boxes (also called blocks or regions) contains the digits from 1 to 9 only one time each. The puzzle setter provides a partially completed grid.
Completed Sudoku puzzles are usually a type of Latin square with an additional constraint on the contents of individual regions. Leonhard Euler is sometimes incorrectly cited as the source of the puzzle, based on his work with Latin squares.[1]
The modern puzzle was invented by an American architect, Howard Garns, in 1979 and published by Dell Magazines under the name "Number Place".[2] It became popular in Japan in 1986, after it was published by Nikoli and given the name Sudoku, meaning single number. [3] It became an international hit in 2005[citation needed].
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