9x9, 6x6 and Samurai Sudoku
Offers classic Sudoku and variants, as well as an online solver. |
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. |
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
Blog 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. |
Fundoku
Randomly generated puzzles at three difficulty levels. |
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. |
Heebie.co.uk
News and puzzles. |
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. |
My Days Are Numbered
An article by Seth Stevenson offering a brief overview of Sudoku. |
Nikoli
From the company that introduced the game to Japan in 1984. Description, history, tutorial, and instructions on constructing custom puzzles. |
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. |
Puzzle Japan
Offers tutorial, downloadable puzzles (PDF format), and a Java applet. |
Simple Sudoku Solver
JavaScript brute force solver. |
Sky One
Information on UK-based cellular provider's world-record largest Sudoku puzzle and accompanying contest. |
SolveMySudoku.com
Browser-based puzzle solver. |
Solving Sudoku
Step by step guide to solving sudoku puzzles. Goes from basic to advanced techniques. |
Sudoku
Free daily puzzle with solution. Includes archive of past puzzles. |
Sudoku
Provides sudoku puzzles in easy, medium and hard levels with their solutions. Also provides facility for daily email sudoku newsletter. |
Sudoku Addict
Offers printable grids and solution walkthroughs. |
Sudoku enumeration
Several programs in different languages for analyzing possible Sudoku combinations. |
Sudoku Fun Puzzles
A website representation of Sudoku, the broad sheet newspaper puzzle imported from Japan. Leaderboard lets players compare completion times. |
Sudoku Helper
Free online helper application. Shows options for each square, and allows backtrack, restart, or save. |
Sudoku Madness
Seven days of daily puzzles. |
Sudoku Master
Free daily grids that can be printed. Also offers solution and archive. |
Sudoku Online
Includes Sudoku tips and strategies as well as a downloadable game and a 3D Sudoku puzzle. |
Sudoku Online Solver from friko.net
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
Offers four difficulty levels. The puzzles can be solved online or downloaded as a PDF file. [English/German/French/Spanish/Dutch/Portuguese/Italian] |
Sudoku-san
Free daily puzzles with four difficulty levels. Also offers a solving assistant and downloadable e-book collections for purchase. |
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.li
History, instructions, variants and puzzles in four difficulty levels (PDF format). [German/French/English/Spanish/Italian] |
SuDokuMate
SuDokuMate is a SuDoku Helper (not a Solver) that replaces pencil and paper to aid solving. |
SudokusWeb.com
Free daily printable Sudokus. Also offers history, rules, and solving techniques. [English/Spanish/French/Catalan/German/Portuguese] |
The Daily Sudoku
Today's daily Sudoku puzzle from www.dailysudoku.co.uk. |
The Economist: Do you sudoku?
Article on the puzzle's popularity in the United Kingdom and elsewhere. |
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. |
The Guardian: Sudoku fever grips UK newspaper readers
By Stephen Brook. Article covers how the UK craze got started. |
The Heebie Su Doku Site
Offers a glossary of terms, links to puzzles and variants, and tips for solving. |
The Sudoku Grandmaster
Self-styled Grandmaster offers tips on life as Sudoku, humorous claims of achievement, and a daily puzzle. |
The Times
Articles and puzzles from The Times (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 varients of Sudoku. |
Yosmany.net
Offers HTML to add a JavaScript-based puzzle to any site. [English/Spanish] |
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