Search found 4808 matches

by lkaufman
Wed Jan 27, 2010 10:55 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Clone detection test
Replies: 129
Views: 37647

Re: Clone detection test

I've run the test on various versions of Rybka, RobboLito, and Komodo (so far, others to follow) at both five and six ply (with 3 ply added to stated depth of Rybka versions). The closest correlations for the most part are programs with themselves at the different depth, which indicates that for thi...
by lkaufman
Wed Jan 27, 2010 2:46 am
Forum: Computer Chess Club: General Topics
Topic: man vs machine
Replies: 30
Views: 5007

Re: man vs machine

Ok---you have the strongest chess program, and a state of the art computer. How much handicap would the leading Grandmasters need---to have a chance of winning? I hosted something like eight or nine handicap matches between various Rybka versions (on a quad or octal) and Grandmasters at tournament ...
by lkaufman
Wed Jan 27, 2010 2:21 am
Forum: Computer Chess Club: General Topics
Topic: man vs machine
Replies: 30
Views: 5007

Re: man vs machine

Someone should run a tournament testing weak engines against strong engines with piece odds so we can estimate how many elo a piece is worth. I ran plenty of such matches about two years ago. The rating difference depends strongly on the time limiit; the slower the game, the greater the rating diff...
by lkaufman
Wed Jan 27, 2010 2:17 am
Forum: Computer Chess Club: General Topics
Topic: man vs machine
Replies: 30
Views: 5007

Re: man vs machine

I think Rybka could be designed to play much stronger than it did with Knight odds. The problem is that it sees itself totally lost and doesn't see a way out. If the algo would try and complicate the position even if it is worse then the outcome might be different. For example it should be "taught"...
by lkaufman
Mon Jan 25, 2010 5:37 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: First experience with Igorrit
Replies: 28
Views: 7706

Re: First experience with Igorrit

After about 10k positions at 1 minute, Rybka still had a small lead over Robbo. The margin of error is hard to calculate because many positions occur more than once, so the move choice is not just right or wrong, but could be for example 60% right. So I would say that I am not sure which program is ...
by lkaufman
Mon Jan 25, 2010 3:28 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: RobboLito ... IvanHoe v70 tables, values
Replies: 1
Views: 1110

Re: RobboLito ... IvanHoe v70 tables, values

Some are identical, such as queen attacking various pieces 2,5 or rook-king-eighth 5, 10, some are extremely close like rook-king-sixth 5,15 vs. my 4,16. I don't have the time or desire to go thru all this in detail and list all the many similarities unless someone wants to hire me to do this. I'd r...
by lkaufman
Sun Jan 24, 2010 4:06 am
Forum: Computer Chess Club: General Topics
Topic: Komodo - Rybka in Danger?
Replies: 183
Views: 46674

Re: Komodo - Rybka in Danger?

There is a difference between the questions of whether what the derivative-makers did was illegal and whether it is just dishonest/immoral. Perhaps they reverse-engineered the code, which I believe is not illegal, and then made their own program by modifying it. If it ever went to court, I suppose i...
by lkaufman
Sun Jan 24, 2010 1:53 am
Forum: Computer Chess Club: General Topics
Topic: Komodo - Rybka in Danger?
Replies: 183
Views: 46674

Re: Komodo - Rybka in Danger?

I can't even read RobboLito code myself, I'm not a programmer. I based my conclusion on an email from a reliable independent chess programmer (no connection to Don, me, or Rybka) who sent this king table he either found in or derived from an early Ippo version. He had no access to Rybka code himself...
by lkaufman
Sat Jan 23, 2010 9:59 pm
Forum: Computer Chess Club: General Topics
Topic: Komodo - Rybka in Danger?
Replies: 183
Views: 46674

Re: Komodo - Rybka in Danger?

PostPosted: Sat Jan 23, 2010 4:09 pm Post subject: Re: Komodo - Rybka in Danger? slobo wrote: "2. the presence of these tables is sufficient to call Ippolit derivates clones? 3. Is the evaluation funcion really Rybka's property or it was borrowed by Fruit?" Regarding point 2, I prefer to use the ter...
by lkaufman
Sat Jan 23, 2010 7:01 pm
Forum: Computer Chess Club: General Topics
Topic: Komodo - Rybka in Danger?
Replies: 183
Views: 46674

Re: Komodo - Rybka in Danger?

"I would like to know something: 1. If only you and Vas had the Rybka 3 code, how did the "cloners" managed to get it ? 2. If Rybka's code is alredy "stealed", why you and Vas don't present evidences that the "cloners" code and the Rybka 3 one is the same? " Reply: 1. I don't know, but I suppose th...