Crosswords, Puzzles and Sudoku
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There is no 16-Clue Sudoku: Solving the Sudoku Minimum Number of Clues Problem

The original paper published by the university of Dublin, with the explanation of the methods employed to prove that there is no valid sudoku with less than 17 clues

Download at http://www.math.ie/McGuire_V1.pdf

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An understandable large review of the mathematical underlying methodology

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Mathematics of Sudoku - Wikipedia, the free encyclopedia

Mathematics of Sudoku - Wikipedia, the free encyclopedia

The class of puzzles consists of a partially completed row-column grid of cells partitioned into N regions each of size N cells, to be filled in using a prescribed set of N distinct symbols (typically the numbers {1, ..., N}), so that each row, column and region contains exactly one of each element of the set.

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The basic page to understand Sudoku

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Crosswords, puzzles, sudoku | isBooth web apps

Crosswords, puzzles, sudoku | isBooth web apps | Crosswords, Puzzles and Sudoku | Scoop.it

A great internet games portal with applications to play puzzles, crosswords, sudoku and other mathematical teasers

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An original puzzles, crosswords, sudoku web app for all devices, from smartphones to tablets to computers to xbox and playstation consoles - play immediately:

For the sudoku: http://isbooth.com/sudoku

For the crosswords: http://isbooth.com/crosswords

For the puzzles: http://isbooth.com/puzzles

Now also available:

Geographic Quiz: http://isbooth.com/geoquiz

Fractal Icon Generator: http://isbooth.com/fractal/icon

 

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The Minimum Sudoku problem: a collection of all the 17 clues valid sudokus ever found

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A unique collection of mathematical aesthetic,  given for free by the univesity of Western Australia

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A Pencil-and-Paper Algorithm for Solving Sudoku Puzzles

 

 

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An article to get your sudoku done in no time:

download it at http://www.ams.org/notices/200904/tx090400460p.pdf

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