Sudoku AZ

Sudoku AZ is a free online puzzle platform offering classic Sudoku and a variety of alternative Sudoku games. Its browser-based puzzles require no download or Flash and work on phones, tablets, and desktop computers. Players can choose from Easy, Medium, and Expert difficulty levels, with fresh puzzles generated for each game. The classic 9×9 grid challenges players to place numbers using logic, while other options include Color, Fruit, Diagonal, Killer, Chain, Flower, Samurai, Greater Than, and Letter Sudoku. The site also offers simpler 4×4 puzzles for children and beginners, plus printable Sudoku.

Gameplay tools include pencil notes, hints, undo and redo, an erasable grid, and a timer that can be paused. Training mode explains logical solving techniques, while statistics track solve times, mistakes, hints, and win rates by difficulty. Games and settings are saved in the browser so players can return to a puzzle later. Sudoku AZ also provides guides, tips, and instructions for learning the rules and improving solving skills.