Description: Sudoku is fun number placement brain game that is sweeping the world. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 regions contains all of the digits from 1 to 9. Sounds easy, right? Not! Solving a single puzzle can take an hour or more. But the time flies in this highly addictive game. Are you ready for the challenge? Features: fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 regions contains all of the digits from 1 to 9. Auto saves when you hit home or take a phone call so you can resume where you stopped. Great background music and sound effects. We hope you enjoy Ultimate Sudoku!