The game of Sudoku. You play the game by filling in a 9x9 grid so that every row, every column, and every one of the nine designated 3x3 sub-grids contains the digits 1 throught 9.
Version 2.0 creates a new and improved interface and adds several new features such as undo, highlig…ht mistakes, and if enabled, a tooltip over any tile shows the possible digits that can solve that tile. More