Search found 2909 matches

by Evert
Tue Feb 08, 2011 1:19 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Thermopylay Marathon 2011 (live!)
Replies: 69
Views: 6111

Re: Thermopylay Marathon 2011 (live!)

I noticed that Spartacus seems to give the Spartans more than +2 in the initial position. Is that deliberate?

By the way, the first game between Sjaak and Spartacus has a nice example of hoplite vs. wrong bishop.
by Evert
Mon Feb 07, 2011 6:21 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Thermopylay Marathon 2011 (live!)
Replies: 69
Views: 6111

Re: Thermopylay Marathon 2011 (live!)

Ok. Well, I'll see if I have time to test and send on an update. If I don't, that's just too bad.
by Evert
Mon Feb 07, 2011 2:17 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Thermopylay Marathon 2011 (live!)
Replies: 69
Views: 6111

Re: Thermopylay Marathon 2011 (live!)

In principle I wanted to allow updates only at the end of a complete cycle. But on the other hand, I don't want to discourage people improving their engines. But hasty updates within a tournament are a recipe for trouble. All versions playing now have been extensively tested for not being buggy, (w...
by Evert
Mon Feb 07, 2011 2:14 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Thermopylay Marathon 2011 (live!)
Replies: 69
Views: 6111

Re: Thermopylae Marathon 2011 (live!)

Sjaak vs. Oberon was a very interesting game. At some point Oberon allows Sjaak to promote to a second Queen, so that for more than 50 moves it is facing two Queens (+ two Rooks + Knight). The heavier pieces of the Persians turn out to be quite powerless against the lighter Spartan pieces, which de...
by Evert
Sun Feb 06, 2011 9:44 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Simple question
Replies: 8
Views: 1702

Re: Simple question

outAtime wrote:id still like to get rid of all those s++'s and use something else :) s += 10 perhaps? but that would change the overall result of s right?
Well, yes, but only because there are 12 s++; lines in the example you posted there.
by Evert
Sun Feb 06, 2011 11:47 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Getting ready for Thermopylae
Replies: 56
Views: 6248

Re: Getting ready for Thermopylae

Fortress draws are simply cases where the strong side can make no progress, without an obvious reason, such as being perpetually checked or losing a piece. I know. What I meant was, I dnn't understand how the described fortress draw for king vs. king with nightrider and ferz works. Probably trying ...
by Evert
Sun Feb 06, 2011 3:00 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Getting ready for Thermopylae
Replies: 56
Views: 6248

Re: Getting ready for Thermopylae

In other news, the version of Sjaak I sent to you earlier may be fine. I still haven't found the problem, but testing older revisions shows that the problems I have now have been introduced either shortly before or after the revision I sent you. Ok, and now I have finally found the problem: I made ...
by Evert
Sat Feb 05, 2011 11:57 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Getting ready for Thermopylae
Replies: 56
Views: 6248

Re: Getting ready for Thermopylae

On-the-fly building of end-game tables would be a good solution for determining mating potential of single pieces or simple piece combinations. Mating potential or winning advantage is difficult to derive from piece values. E.g. KNNK is draw with a very large advantage, (despite the fact that there...
by Evert
Sat Feb 05, 2011 10:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Finding the move
Replies: 14
Views: 2704

Re: Finding the move

I find it difficult to see what would cause this switch since the knight appears well posted on the central square, PST etc would make it difficult to move Ng6. Any ideas? How do these engines decide to switch from Bd7 to Ng6? Well, I have no idea why it does it, but Jazz does switch to Ng6 at 11 p...
by Evert
Sat Feb 05, 2011 8:33 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Getting ready for Thermopylae
Replies: 56
Views: 6248

Re: Getting ready for Thermopylae

It looks like we need opening positions badly. I have seen games being replayed until one of the engines make a slightly different move. My random numbers are generated with a different seed each time so that helps I guess. Problem is, I don't think we have a good sense of what makes for a good bal...