gnome-sudoku 0.7.1-1ubuntu1 (i386 binary) in ubuntu gutsy

 It generates unique, symmetrical puzzles and rates their
 difficulty. Games can be played or printed, so GNOME Sudoku can be
 used to print out a set of puzzles to take with you or to play a puzzle
 at a time on screen. All games persist across sessions and you can
 resume any old game at any time, as well as replay any game you've
 already won.
 .
 More information about GNOME Sudoku can be found at
 http://gnome-sudoku.sf.net