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Welcome to "Sudoku9". You can enjoy new games every time with "Sudoku9" that provides infinite number of puzzles all your life. Sudoku is the most popular number puzzle. It is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 99 grid with digits so that each column, each row, and each of the nine 33 sub-grids that compose the grid contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which typically has a unique solution. features - 4 type of Sudoku gamesOriginal SudokuGreater than SudokuKiller Sudoku Calculation Sudoku- Facebook IntegrationShare game result on FacebookShare puzzle on Facebook- Play again, Watch replay- Provides infinite number of puzzles at all levels. Provides infinite number of puzzles and you can play it all your life. - You can choose game level among 5 different levels - Auto saving Always the state of games will be saved and then you can see the last screen when you restart the game. - Memo for candidate numbers You can enter candidate numbers in a cell that you don't know the answer immediately. It will help you to play the game. - Auto memoAuto memo is provided. So you can progress the game quickly. - Recording game score Score of the game is recorded and managed. - Resetting game If you screw up the game, you can initialize the game. - Unlimited undo/redo You can go back previous status using undo/redo function. - Multiple bookmarksYou can move to saved position using bookmark. You can save 5 bookmarks.- Supporting 5 languages (English, Korean, Japanese, 2 Chinese) - Hint function Hint function tells you the answer of a cell when you meet a difficult cell. One hint is provided every 20 minutes.- Display duplicate numbers When you enter a duplicate number, the number will be displayed with different color. It will help you to play games. - Full support for Retina display Provides clear screen with supporting Retina display - When you double tap the screen the mode will be changed to memo mode - Display with different color where you need to compare the numbers. The cells that you should compare the numbers will be painted with different color. It will help you to play games. - Game Center integrationCheck worldwide rankings, the best time ranking in each levels- Various settings Sound Effects On / Off, change the language, etc.- Feedback functionYou can report a bug or your opinion, and are able to communicate with the developer.