from the makers of brain challenge. http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=283585265&mt=8 20,000,000 different grids covering 5 levels of difficulty. The Kakuro game is also included for a different challenge and a richer experience! Solver & Custom Puzzle modes: Get help instantly with any printed Sudoku puzzle (from newspapers, puzzle books, etc.), or make your own puzzle. 6 mini-games to enjoy fast, fun, mind-based challenges between grids. Two cool coaches who will escort you through the whole game and will always be around with something funny to say. Plenty of customization options: Adjust your screen just the way you like it with choices between 16 fonts, 14 background skins, 6 grid styles and 11 different soundtracks. A comprehensive visual tutorial mode for Sudoku and Kakuro beginners, but also advanced lessons with extra tips for experts. A complete set of options for Sudoku fans: A "draft" option, advanced help system, statistics, 3 different grid sizes, instant error checking, display of possible values, Sudoku X game mode, etc.