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Offers classic Sudoku and variants, as well as an online solver.
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Web-based application for automatic Sudoku solving.
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Article by Paula Dear. Covers history in Japan and the UK and compares to the Rubik's cube craze of the 80s.
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Personal page describing Sudoku, rules, strategies, and offering puzzles to print. [Dutch/English]
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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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Offers a different printable puzzle each day. Also includes solutions and FAQ.
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Weblog discussing techniques for creating and solving puzzles, including hard puzzles. Also offers a daily puzzle.
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This web page describes a 19-line (769-byte) OCaml program that solves Sudoku puzzles.
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Articles on the game, its history, and where to find it online.
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Offers a free javascript version of the sudoku game.
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Daily and random puzzles at six difficulty levels, Flash and JavaScript solvers, solving techniques and glossary of terms.
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Offers syndicated puzzles for websites as well as print publications.
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Offers a tutorial for creating puzzles, a Java-based solver, and links to other resources. [English/Japanese]
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Collection of printable grids, ordered by difficulty level. Solutions provided. Includes rules and solving methods.
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Publishing syndicate in the UK and Ireland. Offers several variations, including classic, colour, kids, and Sudoku Word.
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Offers a number of applications and solvers for a variety of platforms. Also offers custom puzzles.
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A project collecting Sudoku with the smallest number of givens that are still uniquely solvable. Offers the puzzle for download in text format.
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An article by Seth Stevenson offering a brief overview of Sudoku.
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Flash version of the Sudoku game. Also offers solution.
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Offers competitions for prizes. Traditional Sudoku, Godoku (letters) and Super Sudoku (16x16).
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Offers a daily puzzle, books, software, and related merchandise. Also offers puzzles for syndication.
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Sudoku Solver by Andrew Stuart. Shows the logic behind solving sample games square by square.
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JavaScript brute force solver.
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Information on UK-based cellular provider's world-record largest Sudoku puzzle and accompanying contest.
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Solves puzzles based on inputted information.
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Step by step guide to solving sudoku puzzles. Goes from basic to advanced techniques.
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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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SuDokuMate is a SuDoku Helper (not a Solver) that replaces pencil and paper to aid solving.
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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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Offers printable grids and solution walkthroughs.
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Includes Sudoku tips and strategies as well as a downloadable game and a 3D Sudoku puzzle.
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Das Programm von Friko.net erstellt und löst zufällige oder vorgegebene Puzzles, druckt sie aus und macht Lösungsvorschläge.
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Offers daily puzzle in PDF format. Includes archive, FAQ, and a "dozen" variant.
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Free daily puzzles with five difficulty levels with their solutions. Also offers guide to solve Sudoku puzzles.
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Several programs in different languages for analyzing possible Sudoku combinations.
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Propone una raccolta di sudoku risolvibili online o stampati. Sono anche trasportabili come file .pdf.
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Free daily puzzles with four difficulty levels. Also offers a solving assistant and downloadable e-book collections for purchase.
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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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Täglich neue Rätsel in fünf Schwierigkeitsstufen zum Ausdrucken, Downloaden (PDF) oder Online-Spielen.
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Free daily puzzles with five difficulty levels. Also offers printable e-book.
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Article on the puzzle's popularity in the United Kingdom and elsewhere.
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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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By Stephen Brook. Article covers how the UK craze got started.
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Offers a glossary of terms, links to puzzles and variants, and tips for solving.
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Daily sudoku and killer sudoku puzzles from The Times newspaper, London.
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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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Offers a database of crafted puzzles, organized by difficulty. Also offers FAQ and forum. [Norwegian/English]
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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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Campionato Mondiale di Sudoku svoltosi a Lucca. Presenta il campionato, le classifiche, l'organizzazione.
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Offers HTML to add a JavaScript-based puzzle to any site. [English/Spanish]
