Sensible Sudoku is a fun, carefully designed game that will challenge your skills in an enjoyable experience. Sensible Sudoku includes a pleasant interface, elegant audio and enjoyable gameplay. More than just a puzzle interface, Sensible Sudoku was designed to be a compelling experience. And at the core there's a sophisticated Sudoku engine capable of generating billions of puzzles in multiple difficulty levels. Game features: • Dynamic Sudoku puzzle generator: generate billions of unique Sudoku puzzles • Four difficulty settings: from Easy to Extreme level • All boards have unique solutions: all you need is logic, no guessing required • Includes pencil marks to allow annotations • Allows playing with incorrect numbers (harder) or without incorrect numbers (more fun) • Includes an option to check for incorrect numbers and undo them • Includes help system with cell, area and full hints as well as pencil-all • Auto Save/Restore game: peacefully play a puzzle as you go, when you can • Can be played with the stylus or cursor/joystick: optimized for one-hand use • Windows Mobile square-screen aware: includes a special interface designed for square devices. Also compatible with VGA devices • Elegant audio effects designed for a pleasant experience • Secure online ordering and Free lifetime software upgrades