Over 20,000 Sudoku puzzles await in Sudoku Challenger: Easy to Advanced. With 7 levels of difficulty settings, everyone from beginners to advanced players can enjoy solving puzzles. Features: - Various difficulty settings: Choose from 7 levels to match your skill. - DAILY CHALLENGE: Challenge yourself with a new Sudoku every day! You can feel the progress every day. - Hint function: When you get stuck, randomly set the answer in one blank cell. - Memo function: It is possible to memorize numbe