A Sudoku puzzle initially displays a partially filled grid. The aim of the game is to fill each square with a number from 1 - 9. Each number can only appear once in the same row, column or 3 x 3 box. DISCLAIMER: Creating an app takes time and money, In order to keep creating great and free apps, we are using a new search service to monetize our apps. With this service we are able to create more great apps for you guys.