Ultimate Sudoku is a challenging puzzle game for which you have to use the logic to solve it. The sudoku is played on a lattice board divided into nine 3x3 boxes that consists of nine columns and nine rows. Some squares have initial number, symbols or letters called clues that help you find the remaining ones. All of the squares must contain a symbol, number o letter, and they can only be used once in any column, box, or row. The difficulty lies in that there is only one way to solve it. The game features good graphics with multiple varieties and options. It also includes step-by-step tutorials that explain you the rules and techniques of the game. It also allows you to print the game to solve it with a pen whenever and wherever you want. In general, the sudoku game is an addictive brain-teaser that help you develop your mental skills and the logical thinking, while providing hours and hours of fun. It is excellent to train your brain and keep it healthy or simply to kill some time while you are waiting somewhere. It supports Windows 2000/XP and the trial version allows you to play for 30 minutes.