$ sudo apt-get remove pychess 

Uninstall pychess including dependent package

If you would like to remove pychess and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove pychess 

Use Purging pychess

If you use with purge options to pychess package all the configuration and dependent packages will be removed.

$ sudo apt-get purge pychess 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove pychess 

See Also,