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The post 20 Printable Sudoku Puzzles to Test Your Smarts appeared first on Reader's Digest. You want to start with the easy ones, but if you're an expert, you can skip to the extra hard puzzles.
Sudoku. Completely fill the 9x9 grid, using the values 1 through 9 only once in each 3x3 section of the puzzle. By Masque Publishing
A tabletop version of Sudoku can be played with a standard 81-card Set deck (see Set game). A three-dimensional Sudoku puzzle was published in The Daily Telegraph in May 2005. The Times also publishes a three-dimensional version under the name Tredoku. Also, a Sudoku version of the Rubik's Cube is named Sudoku Cube.
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.
Description: Killer Sudoku Puzzle: Date: 26 October 2007: Source: Own work: Author: Toon Spin ()Other versions: Derivative works of this file: Killersudoku color solution.svg Original was a PNG file by en:SGBailey from data he/she got from the Times.
Web Sudoku is an online sudoku website which was rated as one of the best 50 fun and games website by Time. [1] It was founded by Gideon Greenspan and Rachel Lee. [ 2 ] The website was rated as the 7265th best website in the world by Jonathan Harchick in his book The World's Best Websites . [ 3 ]
Daily Sudoku puts a whole new twist on the classic game you know and love! Play for score as you enter numbers with the clock ticking away, but don't guess or you'll lose points and the Perfect Bonus!
A Sudoku may also be modelled as a constraint satisfaction problem. In his paper Sudoku as a Constraint Problem, [14] Helmut Simonis describes many reasoning algorithms based on constraints which can be applied to model and solve problems. Some constraint solvers include a method to model and solve Sudokus, and a program may require fewer than ...
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