Sudoku is a number puzzle where you solve the puzzle by filling in all the blank squares with numbers between 1 and 9. Each number can appear only once in each row, once in each column and once in each of the 3x3 box. The following is a list of options the game features: - Automatically generate new games at the levels of easy, medium or hard. - Create you own puzzles and save them. This is handy if you want to copy the puzzles from the web or news paper and solve them on the go. - Option to tell you if all your answers are correct so far or how many are incorrect. - Automatically tell you when you have made a mistake. This is very useful for beginners. - Add memos to cells to remind you of the numbers you hope belong to each cell. - Marking of rows and columns to help with the puzzle solving.