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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 Puzzles - http://www.sudokupuzz.com
Free daily puzzles with five difficulty levels with their solutions. Also offers guide to solve Sudoku puzzles. |
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Information For Beginners - http://www.forbeginners.info/sudoku-puzzles/
Collection of printable grids, ordered by difficulty level. Solutions provided. Includes rules and solving methods. |
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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 Place - http://sudokuplace.com/
Offers daily puzzle in PDF format. Includes archive, FAQ, and a "dozen" variant. |
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Universal Press Syndicate - http://www.amuniversal.com/ups/features/sudoku/
Offers monochrome and color grids and variations for online and print syndication. Information on syndication as well as an interview with creator David Bodycombe. |
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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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Grant Gibson - http://www.grantgibson.co.uk/sudoku/
Offers syndicated puzzles for websites as well as print publications. |
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Sudoku Online Solver - http://sudoku.friko.net/
Free online generator, solver, and helper. [English/French/Spanish/Polish] |
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Sudoku - http://www.sudoku.li/english/
History, instructions, variants and puzzles in four difficulty levels (PDF format). [German/French/English/Spanish/Italian] |
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World Sudoku Championship - http://www.wsc2006.com/
Information on the 2006 World Sudoku Championship held in Italy. Includes background information, events, results and FAQ. [English, Italian] |
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SuDoKu-Cracker - http://www.the24net.com/sudoku/
Only creates puzzles with a "unique solution". The built-in generator has six different levels of difficulty and can generate many (millions) different puzzles. All puzzles can be printed, exported, saved and opened again. |
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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 Economist: Do you sudoku? - http://www.economist.com/displaystory.cfm?story_id=3992476
Article on the puzzle's popularity in the United Kingdom and elsewhere. |
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The Guardian: Sudoku fever grips UK newspaper readers - http://media.guardian.co.uk/site/story/0,14173,1480828,00.html
By Stephen Brook. Article covers how the UK craze got started. |
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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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Free Sudoku Puzzle - http://www.freesudokupuzzle.net/
Articles on the game, its history, and where to find it online. |
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Sudoku Madness - http://www.sudokumadness.net/syndication/weekly.rss
Seven days of daily puzzles. |
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Sudoku - http://sudoku.cc/
Free daily puzzle with solution. Includes archive of past puzzles. |
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The Guardian: So you thought Sudoku came from the Land of the Rising Sun... - http://observer.guardian.co.uk/uk_news/story/0,6903,1484328,00.html
Article by David Smith covering the puzzle's origins as "Number Place" by Dell Puzzle Magazine in New York in the 1970s. |
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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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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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Christiaan Olie - http://familieolie.filternet.nl/sudokuenglish.html
Personal page describing Sudoku, rules, strategies, and offering puzzles to print. [Dutch/English] |
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9x9, 6x6 and Samurai Sudoku - http://www.sudoku.4thewww.com
Offers classic Sudoku and variants, as well as an online solver. |
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SuDokuMate - http://www.sudokumate.com/sudokumate.asp
SuDokuMate is a SuDoku Helper (not a Solver) that replaces pencil and paper to aid solving. |
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The Heebie Su Doku Site - http://sudoku.toplisted.net/syndicate/feed.php?syndtype=top&syndid=1648
Offers a glossary of terms, links to puzzles and variants, and tips for solving. |
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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] |
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Sudoku - http://home.arcor.de/clemens-pichl/Sudoku.htm
Generates and solves classic and X-Sudoku Problems. Diverse options and an integrated help facility makes this program best of class. |
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Minimum Sudoku - http://www.csse.uwa.edu.au/~gordon/sudokumin.php
A project collecting Sudoku with the smallest number of givens that are still uniquely solvable. Offers the puzzle for download in text format. |