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2. Sudoku solving algorithms - Wikipedia

   en.wikipedia.org/wiki/Sudoku_solving_algorithms

   A typical Sudoku puzzle. A standard Sudoku contains 81 cells, in a 9×9 grid, and has 9 boxes, each box being the intersection of the first, middle, or last 3 rows, and the first, middle, or last 3 columns. Each cell may contain a number from one to nine, and each number can only occur once in each row, column, and box.

3. What is sudoku? Here's how to play the math puzzle and ... - AOL

   www.aol.com/news/sudoku-play-math-puzzle-solving...

   Try Sudoku. The logic puzzle has simple rules, and is easy to learn. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in ...

4. Sudoku - Wikipedia

   en.wikipedia.org/wiki/Sudoku

   A Sudoku puzzle can be expressed as a graph coloring problem. [31] The aim is to construct a 9-coloring of a particular graph, given a partial 9-coloring. The fewest clues possible for a proper Sudoku is 17. [32] Tens of thousands of distinct Sudoku puzzles have only 17 clues. [33]

5. Mathematics of Sudoku - Wikipedia

   en.wikipedia.org/wiki/Mathematics_of_Sudoku

   The general problem of solving Sudoku puzzles on n 2 ×n 2 grids of n×n blocks is known to be NP-complete. [8] A puzzle can be expressed as a graph coloring problem. [9] The aim is to construct a 9-coloring of a particular graph, given a partial 9-coloring. The Sudoku graph has 81 vertices, one vertex for each cell.

6. Play Sudoku Online for Free - AOL.com

   www.aol.com/games/play/masque-publishing/sudoku

   Sudoku. Completely fill the 9x9 grid, using the values 1 through 9 only once in each 3x3 section of the puzzle. By Masque Publishing

7. Taking Sudoku Seriously - Wikipedia

   en.wikipedia.org/wiki/Taking_Sudoku_Seriously

   Taking Sudoku Seriously: The Math Behind the World's Most Popular Pencil Puzzle is a book on the mathematics of Sudoku. It was written by Jason Rosenhouse and Laura Taalman, and published in 2011 by the Oxford University Press.

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9. Glossary of Sudoku - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_Sudoku

   A Sudoku variant with prime N (7×7) and solution. (with Japanese symbols). Overlapping grids. The classic 9×9 Sudoku format can be generalized to an N×N row-column grid partitioned into N regions, where each of the N rows, columns and regions have N cells and each of the N digits occur once in each row, column or region.