Sudoku is a logic puzzle where the aim is to place the numbers 1 through 9 in every square in the 9x9 grid so that every row, column and 3x3 "region" includes each number once only.

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Bob Hanson's Sudoku Assistant
JavaScript-based gameboard and solver. Can use cross-hatch scanning and subset elimination.
Offers a daily Sudoku with six levels of difficulty, with an archive of old puzzles and an interactive assistant.
Braingle Sudoku
Interactive sudoku game with high score tracking. Includes solution strategies.
Creative Spark Studios: Sudoku
Includes a generator.
Daily Sudoku Puzzle
Offers daily timed puzzle and four difficulty levels. [English/Portuguese/Spanish/German/French/Italian]
Fiendish Sudoku
Free daily sudoku puzzles at five difficulty levels. Online solving grid with hints and step-by-step solutions.
Free Sudokus
Offers hints, solution checking and grids in sizes other than 3x3.
Offers up to four difficulty levels.
Jaap Scherphuis' Generator
Java-based generator offers four levels of difficulty. Includes view of solution.
Paul's Pages
Offers random, crafted, and non-standard puzzles. Includes hints and import/export tool.
Picture Sudoku
Uses pictures instead of numbers.
Seeing With C - Sudoku Solver
A solver program with an article explaining the algorithm used.
Speed Sudoku
Play fast-paced online sudoku races for free.
Offers daily puzzle, downloadable games, and instructions.
Sudoku by Froggy
Generates 2x2, 3x3, and 5x5 puzzles with adjustable level of difficulty.
Sudoku Hints
Offers daily web-based puzzles with five difficulty levels. Includes solver, helper, and XML feed.
Sudoku Puzzles
Daily puzzles offered at four difficulty levels, available for play online or printed out. Includes rules and archives.
Sudoku Zone
Play sudoku puzzles online for free.
Web Sudoku
Free puzzles with difficulty levels ranging from easy to evil. Provides print and online syndication.

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Last update:
April 1, 2016 at 3:41:43 UTC
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