Sudoku - classic logic puzzle game, which is suitable for beginners and expert. Whether you want to exercise your logic thinking or just pass the time, get the Sudoku will be a good choice. Have a break with the Sudoku puzzle, rescue you from the busy works and heavy stress. Play it in anywhere and anytime. Choose the level you like, have some daily exercises. Train your logic and sensitivity to numbers gradually. Features: -3 kinds of modes: 2×2, 2×3 and 3×3 grid -Detailed rules explanation for you -Turn on notes to make notes on phone -Use Erase to delete the wrong number -Click Undo to withdraw your last step -Use Hint to guide you when you are stuck -Time keeping to record the time you used -Personal record: track your progress -More than 200 well-formed puzzles -Auto-save your unfinished Sudoku puzzle Play this Sudoku, you can train your brain at anywhere, anytime. Have fun and exercise your mind at the same time with learn-able, and user-friendly fun math puzzles! You can gain endless pleasure and relaxation from the wonderful logic brain training puzzles. All your family members can join in, open an math crossword brainstorming, become great Sudoku killer.