Classic Sudoku

Classic Sudoku has 200,000 unique and addicting puzzles. The rules are simple and you can learn to play in just minutes. Classic Sudoku features multiple levels of difficulty, hints and tips, game timer and customizable backgrounds. Our Pencil In feature allows a player to pencil in all possible answers as the correct answer, then erase the wrong answers as the correct answers are surmised. Play on your PC or print the puzzle and take it with you, plus you can challenge your friends to compete against your puzzle time.