Rybka's best chess program is disqualified and lacks all awards

In professional sports, an athlete can be disqualified for doping, but for what offense can a computer program be punished? It turns out that in the world of computer eSports, namely, in chess, there are also strict rules. A commission of 34 chess engine developers made a decision: the multiple world champion in chess, the Rybka program, was found guilty of plagiarism of the source codes from two Open Source programs Crafty and Fruit .

Now the executive committee of the International Computer Games Association demands from the author of the program, a master of international class and a graduate of the Massachusetts Institute of Technology Vasik Rajlich to return all trophies and prize money that he earned fraudulently, that is, grossly violating the GNU GPL license.

Rybka will never again be admitted to the World Cup, and the WCCC committee has requested the organizers of other tournaments.

From May 2008 to December 2010, Rybka was the strongest chess program in all well-known rating lists. She won many official computer chess tournaments, including the World Chess Championship among computer programs in 2007, 2008, 2009 and 2010.
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In 2007, Rybka was the first computer program to win a handicap match against a protein grandmaster (who was offered a pawn handicap).

Rybka is a closed source program. Old versions of the program are distributed from the site for free, and the latest Rybka 4 is priced from $ 45 to $ 119 , depending on the platform, the number of processors supported and the availability of a GUI.

Suspicion of plagiarism arose in May 2007 , when the new chess program Strelka, created by Yury Osipov, appeared. The chess community immediately blamed the Russian author for plagiarism, because Strelka was clearly similar to Rybka: in some cases, she even made similar mistakes. Osipov assured that his program is not based on Rybka at all, but on the open source project Fruit.