Sudoku
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| Christiaan Olie - Personal page describing Sudoku, rules, strategies, and offering puzzles to print. [Dutch/English] |
| Daily SuDoku - 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. |
| Daily Sudoku - Offers a different printable puzzle each day. Also includes solutions and FAQ. |
| Dan Rice's Sudoku Blog - Weblog discussing techniques for creating and solving puzzles, including hard puzzles. Also offers a daily puzzle. |
| Flying Frog Consultancy - This web page describes a 19-line (769-byte) OCaml program that solves Sudoku puzzles. |
| Free Sudoku Puzzles - Offers a free javascript version of the sudoku game. |
| Gaby Vanhegan - Daily and random puzzles at six difficulty levels, Flash and JavaScript solvers, solving techniques and glossary of terms. |
| Grant Gibson - Offers syndicated puzzles for websites as well as print publications. |
| The Heebie Su Doku Site - Offers a glossary of terms, links to puzzles and variants, and tips for solving. |
| Hirofumi Fujiwara's Sudoku - Offers a tutorial for creating puzzles, a Java-based solver, and links to other resources. [English/Japanese] |
| Information For Beginners - Collection of printable grids, ordered by difficulty level. Solutions provided. Includes rules and solving methods. |
| Knight Features - Publishing syndicate in the UK and Ireland. Offers several variations, including classic, colour, kids, and Sudoku Word. |
| Maths Is Fun - Offers a number of applications and solvers for a variety of platforms. Also offers custom puzzles. |
| Minimum Sudoku - A project collecting Sudoku with the smallest number of givens that are still uniquely solvable. Offers the puzzle for download in text format. |
| Play Sudoku - Flash version of the Sudoku game. Also offers solution. |
| Prize Sudoku - Offers competitions for prizes. Traditional Sudoku, Godoku (letters) and Super Sudoku (16x16). |
| Puzzle Bus - Offers a daily puzzle, books, software, and related merchandise. Also offers puzzles for syndication. |
| Scanraid LTD Search Technologies - Sudoku Solver by Andrew Stuart. Shows the logic behind solving sample games square by square. |
| Simple Sudoku Solver - JavaScript brute force solver. |
| Sky One - Information on UK-based cellular provider's world-record largest Sudoku puzzle and accompanying contest. |
| Solve My Sudoku - Solves puzzles based on inputted information. |
| Solving Sudoku - Step by step guide to solving sudoku puzzles. Goes from basic to advanced techniques. |
| Sudoku - Provides sudoku puzzles in easy, medium and hard levels with their solutions. Also provides facility for daily email sudoku newsletter. |
| Sudoku - Free daily puzzle with solution. Includes archive of past puzzles. |
| Sudoku - History, instructions, variants and puzzles in four difficulty levels (PDF format). [German/French/English/Spanish/Italian] |
| Sudoku - Generates and solves classic and X-Sudoku Problems. Diverse options and an integrated help facility makes this program best of class. |
| Sudoku Addict - Offers printable grids and solution walkthroughs. |
| Sudoku enumeration - Several programs in different languages for analyzing possible Sudoku combinations. |
| Sudoku Online - Includes Sudoku tips and strategies as well as a downloadable game and a 3D Sudoku puzzle. |
| Sudoku Online Solver - Free online generator, solver, and helper. [English/French/Spanish/Polish] |
| Sudoku Place - Offers daily puzzle in PDF format. Includes archive, FAQ, and a "dozen" variant. |
| Sudoku Puzzles - Free daily puzzles with five difficulty levels with their solutions. Also offers guide to solve Sudoku puzzles. |
| Sudoku Puzzles - Offers four difficulty levels. The puzzles can be solved online or downloaded as a PDF file. [English/German/French/Spanish/Dutch/Portuguese/Italian] |
| 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. |
| SuDoKu-Cracker - 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. |
| SuDokuMate - SuDokuMate is a SuDoku Helper (not a Solver) that replaces pencil and paper to aid solving. |
| Sudoku-san - Free daily puzzles with four difficulty levels. Also offers a solving assistant and downloadable e-book collections for purchase. |
| SudokusWeb.com - Free daily printable Sudokus. Also offers history, rules, and solving techniques. [English/Spanish/French/Catalan/German/Portuguese] |
| Sudoweb - Free daily puzzles with five difficulty levels. Also offers printable e-book. |
| The Times Sudoku - Daily sudoku and killer sudoku puzzles from The Times newspaper, London. |
| Universal Press Syndicate - Offers monochrome and color grids and variations for online and print syndication. Information on syndication as well as an interview with creator David Bodycombe. |
| Vegard Hanssen's page - Offers a database of crafted puzzles, organized by difficulty. Also offers FAQ and forum. [Norwegian/English] |
| Wikipedia: 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. |
| World Sudoku Championship - Information on the 2006 World Sudoku Championship held in Italy. Includes background information, events, results and FAQ. [English, Italian] |
| 9x9, 6x6 and Samurai Sudoku - Offers classic Sudoku and variants, as well as an online solver. |
| Yosmany.net - Offers HTML to add a JavaScript-based puzzle to any site. [English/Spanish] |
| My Days Are Numbered - An article by Seth Stevenson offering a brief overview of Sudoku. (May 31, 2005) |
| The Economist: Do you sudoku? - Article on the puzzle's popularity in the United Kingdom and elsewhere. (May 19, 2005) |
| The Guardian: So you thought Sudoku came from the Land of the Rising Sun... - Article by David Smith covering the puzzle's origins as "Number Place" by Dell Puzzle Magazine in New York in the 1970s. (May 15, 2005) |
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The Guardian: Sudoku fever grips UK newspaper readers - By Stephen Brook. Article covers how the UK craze got started. (May 10, 2005) |
| BBC News: The puzzling popularity of Su Doku - Article by Paula Dear. Covers history in Japan and the UK and compares to the Rubik's cube craze of the 80s. (April 22, 2005) |
| The Daily Sudoku - Today's daily Sudoku puzzle from www.dailysudoku.co.uk. [RSS] |
| Sudoku Madness - Seven days of daily puzzles. [RSS] |
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