In order to solve this issue it is necessary to re-install the game.

You can accomplish this in two ways.  The first, and easiest is to download the game OTA (Over-The-Air) and install it that way.

• Point the browser on your device to the following link:

              http://www.bplay.com/dl/Sudoku

• Follow the on-screen prompts to install the game.  It should remain activated, and you will know right away if it was successful as the puzzle you are displayed will be different than what was previously there.

The second installation method is done via Desktop Manager. 

• You can download the game by visiting
  

              http://www.bplay.com/dl/Sudoku

• After selecting your device, and downloading the .zip file, extract the game from the .zip file to your desktop. 
  
• You can then install it via Desktop Manager.