Description: Sudoku Master is back! The best-selling, award-winning classic has finally arrived on the iPhone and iPod touch. Billions of Puzzles: Sudoku Master has billions, yes billions of puzzles for you to solve. Use pencil marks like in real life, cross-hatching, hints and track your puzzle statistics. Try multiple difficulty levels, including DIABOLICAL! Play Live Games with Friends: Sudoku Master Live now offers real-time puzzle solving with friends playing from other phones or iPods and even players connecting from social networks like Facebook, MySpace, My Yahoo Apps, Bebo, Hi5, Friendster and more. You can work on the same puzzle with up to 3 friends at the same time or race each other on the same board to see who gets more correct marks. Improve your rank and attain higher titles based on the quality of your play. Chat with your friends during the game and add them to your buddy list. A free computer version of this game is available for your favorite social network. Find out more by visiting our website. Sudoku Master receives constant updates with new features, free of charge. If you have suggestions for how we can make the game better, please let us know.