Brain training, relaxation, killing time, brain teaser, and so on, how to play depends on you! You can take it anywhere, you can play it anywhere. Please play it whenever you like and as much as you want! There are 5,000 or more questions! I have prepared the finest Sudoku! All can be solved theoretically, so even for the unknown parts if you think carefully you will see the answer. From simple to difficult, challenge the questions according to your level! -If you complete all the extra pack you get a new theme color. -Each time you complete the question you get a heart. Let’s use it to unlock the extra pack! -Challenge everyday with the daily challenge. Continue and earn a special reward. -You can choose theme color from the setting. Let's find the color you like! -Make more memos. Memos that are no longer needed change their color automatically to notify. -It is easy to see the vertical and horizontal and the block as the color changes. This wonderful and superb Sudoku to you!