Aboiut Sumerian and programs, I am fairly certain that I announced programmers from the Gothic Chess Computer World Championship were all invited to participate.

I don't see the logic in the posts that say "once one engine is allowed, all must be allowed." This was a special tournament. I believe disallowing engines by default, unless so specified by the tournament director, is a good policy.

Suppose players have a collection of chess engines and they want to see how they perform against one another?

Why not have an unrated tournament where all of the engines can bash it out?

That might be something of interest to the whole community.

I will try and find my post(s) about inviting the computers in the event.