Jörg Knappen wrote on Tue, Apr 10, 2012 09:18 AM UTC:
Unfortunately, the fix is not yet complete; here is the Link to Archabbot Chess from the Alphabetical Index section "Ar":
/play/index/msdisplay.php?itemid=MParchabbottches
and it now returns a 404 (instead of the home page of the pbm system).
After some hacking, I found the true link which works:
http://www.chessvariants.org/index/msdisplay.php?itemid=MParchabbottches
-- replacing "play" with "www" fixes the link.