Play Sudoku free today! Sudoku is the classic challenging logic game of numbers. Write 1-9 in every square without having the same number in the same two rows or columns. Train your brain every day and become a math master by playing free Sudoku! Features of Sudoku by Block Puzzle Games: - TONS of puzzles, all free! - 4 difficulty modes: Easy, Medium, Hard, Expert - Hints for when you're stuck - Pencil to mark numbers in squares. If a square can be a 7 or a 2, pencil them both in for later! - Erase mistakes! - Game highlights all the numbers on the board that are the same as the one you click on. Solve puzzles faster! - Play without wifi - Save your progress automatically and continue your game later!