Sudoku Master is a popular number puzzle game. Whether you want to relax, stay mentally active, or even exercise your logical and reasoning abilities, you can participate in a few free Sudoku puzzle games. Our Sudoku game includes over 40000 classic Sudoku titles and sets six difficulty levels, making it suitable not only for beginners but also for advanced or higher end players. We have also developed powerful intelligent prompts that include over a dozen common Sudoku puzzle solving techniques, and all Sudoku puzzles can be solved using these techniques. Game Features Unique answer - each question has only one answer Daily Challenge - One question per day to relax your brain Achievement Trophy - Complete daily challenges and win trophies Intelligent prompt - unable to solve? Prompt to help you pass the level Note taking mode - easy to take notes like on paper How to Play Sudoku The goal of Sudoku games is to fill the 9x9 grid with numbers, so that each column, row, and 3x3 sub gri...