Welcome to Sudoku Classic - Free Brain Puzzles: stimulating for the brain yet very relaxing! The best game that also helps you develop your brain and thinking while solving puzzle games. You can simply solve a puzzle, take up a daily challenge or compete online with friends and family. Feeling excited? Customize your own puzzle with our Level Creator. 4 LEVELS of difficulty Choose the level you want and improve your skills. Make it a breeze or think hard. Relax and take your mind off the hustle and bustle with easy levels. Choose a harder level and practice solving logical problems.