Sudoku Classic is one of the Sudoku Games that you can play on UGameZone.com for free. Use sudoku to keep your brain healthy! In the logic of this interesting game, your task is to fill the number 9x9 squares. Each column, line, and 3 x3 blocks can contain Numbers 1 to 9 only one time. Using the tag or a magic wand when you're stuck. Choose a challenge every day, you will be smart and have a healthy brain!