Comment 3 for bug 248352

You can modify the scores of mahjongg by opening a terminal,
Applications>Accessories>terminal
then typing
ls /var/games/mahjongg.*
and a list of files like
/var/games/mahjongg.easy.scores
will appear. Choose the file named for the level of mahjongg you want to modify. The you type
sudo gedit /var/games/mahjongg.easy.scores
(In this example the level is "easy")
and delete the scores you dont want then save the file.
Choose the file named for the level of mahjongg you want to modify.
Have a good day!
HMJ