Search found 130 matches

by Osipov Jury
Tue Feb 01, 2011 8:00 pm
Forum: Computer Chess Club: General Topics
Topic: Fabien's open letter to the community
Replies: 734
Views: 526953

Re: Fabien's open letter to the community

Students are quite good at this kind of obfuscation. One can do the above to improve speed (one popcnt vs N BSF instructions in a loop) or to make the code appear to be different (both do the same thing, but look significantly different, particularly if you change the variable names as well... You ...
by Osipov Jury
Mon Jan 31, 2011 1:04 am
Forum: Computer Chess Club: General Topics
Topic: Fabien's open letter to the community
Replies: 734
Views: 526953

Re: Fabien's open letter to the community

About copying, rewriting of code and so on. In eval-function of Ivanhoe we can find: U = (POSITION->OccupiedBW >> 8) & wBitboardP; while (U) { b = BSF (U); MobValue -= PawnAntiMobility; BitClear (b, U); } Robert Houdart replace this at: U = (POSITION->Oc...
by Osipov Jury
Sun Jan 30, 2011 1:26 pm
Forum: Computer Chess Club: General Topics
Topic: Rybka 4 Bugfix...... Soon!!!
Replies: 15
Views: 3548

Re: Rybka 4 Bugfix...... Soon!!!

http://rybkaforum.net/cgi-bin/rybkaforum/forum_overview.pl?act=new;tid=20317 By Lukas Cimiotti Date 2011-01-28 14:05 Vas told me he'd do the fix in February - so the real testing will probably start in March. So I guess it will be ready in April. If we add some time as these predictions are always ...
by Osipov Jury
Fri Jan 28, 2011 8:23 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Strelka 2.0 B running for the IPON ...
Replies: 105
Views: 16650

Re: Strelka 2.0 B running for the IPON ...

It would seem to me that by asking multiple times for his permission to commercialize Strelka, that you clearly felt he had this authority. I asked permission of Vasik only once. Hmm.... " ...I would like to ask once more ... " Vas previously not objected to the commercialization of Strelka: "Selli...
by Osipov Jury
Thu Jan 27, 2011 9:15 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Strelka 2.0 B running for the IPON ...
Replies: 105
Views: 16650

Re: Strelka 2.0 B running for the IPON ...

It would seem to me that by asking multiple times for his permission to commercialize Strelka, that you clearly felt he had this authority. I asked permission of Vasik only once. This was done for two reasons: 1. Vasik promised to make a mobile version of Rybka. 2. Strelka was partly based on Rybka...
by Osipov Jury
Thu Jan 27, 2011 8:09 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Strelka 2.0 B running for the IPON ...
Replies: 105
Views: 16650

Re: Strelka 2.0 B running for the IPON ...

My letter to Vas in response to his questions (translate by V.Zakharov): Hi Vas, First of all I would like to excuse for my public pronouncements, that Rybka was developed on the basis of Fruit. There were only subjective guesses and I didn't have right to share unchecked thoughts publicly. Unfortun...
by Osipov Jury
Thu Jan 27, 2011 7:53 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Strelka 2.0 B running for the IPON ...
Replies: 105
Views: 16650

Re: Strelka 2.0 B running for the IPON ...

Are you claiming that you did not suggest Strelka be packaged with Rybka as a variant/flavor of it? That was the reason I was even brought in. As a variant of his program, his permission was required, and frankly, the idea wasn't a happy one since it wasn't just a variant, it was a variant in which...
by Osipov Jury
Thu Jan 27, 2011 12:18 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Strelka 2.0 B running for the IPON ...
Replies: 105
Views: 16650

Re: Strelka 2.0 B running for the IPON ...

Yes, the links are bogus though. The statements predated his later admissions that Strelka was heavily based on RE of Rybka, though there were a number of parts of the RE that were incomprehensible to him. He also added parts of Fruit and other things, which was what made it such a strange patchwor...
by Osipov Jury
Tue Jan 25, 2011 8:26 pm
Forum: Computer Chess Club: General Topics
Topic: why am i not eligable / allowed to vote in poll Fabian
Replies: 12
Views: 2576

Re: why am i not eligable / allowed to vote in poll Fabian

natasha wrote:how can you have a fair and honest poll if you restrict who can and cannot vote :?:
My first pseudonym on russian computer chess forum was "natasha strelka". :D
by Osipov Jury
Thu Jan 20, 2011 8:42 pm
Forum: Computer Chess Club: General Topics
Topic: Rybka bug also found in Houdini??
Replies: 12
Views: 3853

Re: Rybka bug also found in Houdini??

In the case of Rybka, the reason for the slowdown and the growth of a tree in the won positions lies in the method of evaluation hashing (10 bit).
Houdini uses a different method of hashing.