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.
Offers a daily Sudoku with six levels of difficulty, with an archive of old puzzles and an interactive assistant.
Interactive sudoku game with high score tracking. Includes solution strategies.
Includes a generator.
Offers daily timed puzzle and four difficulty levels. [English/Portuguese/Spanish/German/French/Italian]
Free daily sudoku puzzles at five difficulty levels. Online solving grid with hints and step-by-step solutions.
Offers up to four difficulty levels.
Java-based generator offers four levels of difficulty. Includes view of solution.
Offers random, crafted, and non-standard puzzles. Includes hints and import/export tool.
Uses pictures instead of numbers.
A solver program with an article explaining the algorithm used.
Play fast-paced online sudoku races for free.
Offers daily puzzle, downloadable games, and instructions.
Generates 2x2, 3x3, and 5x5 puzzles with adjustable level of difficulty.
Offers daily web-based puzzles with five difficulty levels. Includes solver, helper, and XML feed.
Daily puzzles offered at four difficulty levels, available for play online or printed out. Includes rules and archives.
Play sudoku puzzles online for free.
Free puzzles with difficulty levels ranging from easy to evil. Provides print and online syndication.
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