It looks like glchess is looking for python2.4 and you probably have python 2.5
Edit the ./glchess file and change to top line which should be something like
Code:
#!/usr/bin/python2.4
to this:
and try again. If you're not sure how to do this try typing mc from the console and follow the on screen menus to select the glchess file, edit it and save your changes.