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The Times Sudoku - http://entertainment.timesonline.co.uk/tol/arts_and_entertainment/games_and_puzzles/sudoku/
Daily sudoku and killer sudoku puzzles from The Times newspaper, London. |
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Wikipedia: Sudoku - http://en.wikipedia.org/wiki/Sudoku
An encyclopedia entry describing the rules, history, strategies and variants of Sudoku. Notes that these are a type of "Latin square" which have been analyzed since ancient times. |
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Sudoku.com - http://www.sudoku.com/
Includes an overview of how Sudoku is solved, a monthly contest and a downloadable Sudoku game. Also includes a kids section and discussion forums. |
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Sudoku enumeration - http://www.shef.ac.uk/~pm1afj/sudoku/
Several programs in different languages for analyzing possible Sudoku combinations. |
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Sudoku Online - http://www.sudoku.org.uk/
Includes Sudoku tips and strategies as well as a downloadable game and a 3D Sudoku puzzle. |
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Daily SuDoku - http://www.dailysudoku.co.uk/
Offers daily printable puzzles of varying difficulties, including Sudoku for Kids. Also offers archive of past puzzles, tool for rendering custom puzzles, FAQ, and books for purchase. |
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Sudoku Addict - http://www.sudokuaddict.com/
Offers printable grids and solution walkthroughs. |
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Hirofumi Fujiwara's Sudoku - http://www.pro.or.jp/~fuji/index-eng.html
Offers a tutorial for creating puzzles, a Java-based solver, and links to other resources. [English/Japanese] |
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Gaby Vanhegan - http://vanhegan.net/sudoku/
Daily and random puzzles at six difficulty levels, Flash and JavaScript solvers, solving techniques and glossary of terms. |
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Puzzle Bus - http://www.puzzlebus.com
Offers a daily puzzle, books, software, and related merchandise. Also offers puzzles for syndication. |
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http://www.sudokutoday.com - http://www.sudokutoday.com
Provides sudoku puzzles in easy, medium and hard levels with their solutions. Also provides facility for daily email sudoku newsletter. |
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Knight Features - http://www.knightfeatures.com/KFWeb/content/features/kffeatures/puzzlesandcrosswords/KF/Sudoku/Sudoku_Classic/sudoku_classic.html
Publishing syndicate in the UK and Ireland. Offers several variations, including classic, colour, kids, and Sudoku Word. |
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Simple Sudoku Solver - http://homepage.ntlworld.com/valleyway/solver.html
JavaScript brute force solver. |
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Maths Is Fun - http://www.mathsisfun.net/puzzles.htm
Offers a number of applications and solvers for a variety of platforms. Also offers custom puzzles. |
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The Guardian: Sudoku fever grips UK newspaper readers - http://www.guardian.co.uk/media/2005/may/10/pressandpublishing.uknews
By Stephen Brook. Article covers how the UK craze got started. |
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Sudoku Place - http://sudokuplace.com/
Offers daily puzzle in PDF format. Includes archive, FAQ, and a "dozen" variant. |
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My Days Are Numbered - http://www.slate.com/id/2119796
An article by Seth Stevenson offering a brief overview of Sudoku. |
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Dan Rice's Sudoku Blog - http://sudokublog.typepad.com/sudokublog/
Weblog discussing techniques for creating and solving puzzles, including hard puzzles. Also offers a daily puzzle. |
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pi-c-it Sudoku - http://www.pi-c-it.de/Sudoku/index.php?lang=en
Generates and solves classic and X-Sudoku problems. Diverse options and an integrated help facility. |
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SudokusWeb.com - http://www.sudokusweb.com/
Free daily printable Sudokus. Also offers history, rules, and solving techniques. [English/Spanish/French/Catalan/German/Portuguese] |