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On June 28th 2011 IGCA president David Levy shattered the (computer) chess world with the announcement that programmer Vasik Rajlich, world champion computer chess in 2007, 2008, 2009 and 2010 with Rybka has been found guilty to have plagiarized the work of another chess program called: Fruit.
As a result Vasik Rajlich was banned for life, his 4 world champion titles were taken away, an ICGA press release followed that was picked up by the mainstream media containing all kind of juicy extensions and half truths.
This page is meant to put things back into perspective.
Statements of dissenting chess programmers
Chris Whittington games programmer and entrepreneur in answer to Zach Wegner:
There may be some anecdotal evidence for your model, but, as far as I can tell there is no good proof, just a groupthinky belief. Basically I think your argument is: Vas started with Fruit because he is a thief. Vas is a thief because he started with Fruit. Or, in other words, your argument is circular: the conclusion is the premise and the premise is the conclusion. More...
Ed Schroder producer of the REBEL series and 2-times world champion:
After 3 months of intensive research it's my final conclusion the accusers who investigated the Rybka chess program researched an original program doing all the same things other (good) programs also do. Rybka is an original chess program, the ICGA verdict and ban are uncalled for. More...
Dann Corbit an American programmer and computer chess expert, tester and advisor:
My main complaint is with the process of fault-finding itself. I think that the design of the process was flawed and with a flawed process flawed decisions are far more probable than via correct process. I do not expect the majority of chess programmers to agree with me or with my analysis. My opinion is mine alone but I wanted to say something since it appears to me that a bad process has been used to reach a final decision that affects a man's career in a significant way. More...
Sergei Markoff a Russian chess programmer and author of the commercial chess program SmarThink:
As the Rybka source was never published, the only possible thing to do with disassembly is to say that it contains a code that compiles at the same instuction sequences. But it's not a prove of direct copying of the code. More...
Rybka menu | Rybka originality | Rybka fruitification | TheICGA speaks | Rule 2 | Opinion poll | Dann Corbit
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Rybka-ICGA fiasco