GNOME Sudoku GNOME Sudoku is a logic-based number-placement puzzle in which a 9×9 square must be filled with the correct digits. The unique puzzles can be played on screen or printed. If you do not have time to finish a game, you can resume it any time. Game Play Basics Game rules Save and resume Strategy Useful tips Earmarks Highlighting Keyboard shortcuts Printing Print blank sudokus Print your game Get Involved Help develop Help translate Help write documentation Report a Problem See Also License — Legal information.