Search found 2109 matches

by Michel
Mon Nov 03, 2008 3:53 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Confused by MultiPV
Replies: 36
Views: 5420

Confused by MultiPV

This is probably a naive question but I am wondering what the precise definition of MultiPV is. As far as I can tell there is only one principal variation at any time...

Perhaps someone can enlighten me?

Regards,
Michel
by Michel
Mon Nov 03, 2008 5:52 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Opening book database?
Replies: 11
Views: 3471

Re: Opening book database?

Just a quick remark. I saw that the lastest versions of Scid now also supports polyglot books.
See the description at http://prolinux.free.fr/scid/ .
by Michel
Sat Nov 01, 2008 7:24 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Opening book database?
Replies: 11
Views: 3471

Re: Opening book database?

Do you know where I can find the documentation (specification) for the Polyglot book format?
It can be obtained from the polyglot source code. However I'll put a description of the file format on my website. The main thing is the table with random numbers to compute the Zobrist hash key.
by Michel
Fri Oct 31, 2008 4:02 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Opening book database?
Replies: 11
Views: 3471

Re: Opening book database?

Places to store information such as learning, as well as information about frequency of play, win/lose/draw results, etc. Well it has a scoring system and facilities for learning (which I have not looked at). The advantage of the polyglot format is that it exists(!), it is open(!), it is trivial to...
by Michel
Fri Oct 31, 2008 2:37 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Opening book database?
Replies: 11
Views: 3471

Re: Opening book database?

IIRC, the Crafty approach is to break the book into many segments (I think 2^16 segments), and it would sequentially loop through just one of those segments, which is manageable. In a polyglot book the positions are ordered according to their (Zobrist) hash key. To find a particular key you can do ...
by Michel
Thu Oct 30, 2008 9:13 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Opening book database?
Replies: 11
Views: 3471

Re: Opening book database?

polyglot book format. I would strongly recommend the polyglot book format. I think it is important that GUI's, adapters and chess engines agree on a common open opening book format (rather than proprietary stuff like ctg or abk). The polyglot format has the advantage that it is easy to parse (see t...
by Michel
Mon Oct 27, 2008 6:48 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Arena or similar testing program for Linux
Replies: 24
Views: 5387

Re: Arena or similar testing program for Linux - Own proggie

OpenSource, to use for everyone. if this is what you can call a "licence" Wink
I hope you didn't inteprete my question in a negative way. But an explicit license is necessary to be included in a Linux distribution for example.
by Michel
Sun Oct 26, 2008 6:10 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Arena or similar testing program for Linux
Replies: 24
Views: 5387

Re: Arena or similar testing program for Linux - Own proggie

If anyone is interested in having a Testing Suite that runs platform independent without any GUI and without any CPU usage, please write here.
What is the license?

Best regards,
Michel
by Michel
Sat Oct 25, 2008 6:07 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Arena or similar testing program for Linux
Replies: 24
Views: 5387

Re: Arena or similar testing program for Linux

If I want WinBoard engines to run with an external book, I run them through WB2UCI and Polyglot
.

Well that's a bit of a hack isn't it, using two(!) adapters to do what the GUI could be doing?
Not to mention that WB2UCI only runs on windows and is closed source AFAICS.
by Michel
Sat Oct 25, 2008 4:30 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Arena or similar testing program for Linux
Replies: 24
Views: 5387

Re: Arena or similar testing program for Linux

Likewise, if a Human plays an engine, you would want the engine to use a book, not the Human. So what is against having the engine hande the book? Nothing. But I prefer the GUI handling the book. I have the impression that this is what most people prefer but I maybe wrong. Often you don't like the ...