Author: enrico carrisco
Date: 13:02:53 12/20/05
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On December 20, 2005 at 15:17:25, Alex Schmidt wrote: >Hello, > >Vasik Rajlich kindly agreed to give us an interview: > >http://www.uciengines.de/UCI-Engines/Rybka/vriv/vriv.html > >Thank you Vasik, >Alex Very interesting interview. As far as the question & answer below, I can say that HIARCS shouldn't be listed as benefiting from Fruit 2.1's open source code, however. Clearly, less developed engines and amateurs will benefit from such code more than long-term and highly developed projects. It's also been much of a mutual agreement (my own "basic" analysis of the code in agreement) that aside from Fabien's approach to history pruning, no "breakthrough" ideas appeared in Fruit 2.1's code and that its wonderful play and strength was largely due to how eloquently all its different functions were harmonized. Additionally, you cannot "transplant" an idea (style or approach) of one chess program (search, evaluation, etc.) to another program that has already incorporated a much different set of ideas. It would take more time and effort to have apples and oranges working together efficiently than it would be worth. Regards, -elc. --- 20. Alexander Schmidt: The increase in playing strength of the latest chess engines is unbelieveable. We have since some time with Fruit 2.1 by Fabien Letouzey a very strong open source engine. Do you see a relation between the published sources of such a strong engine and the increase of strength in computer chess in general? How much influence do the ideas of Fruit have on the future of computerchess? Vasik Rajlich: Yes, the publication of Fruit 2.1 was huge. Look at how many engines took a massive jump in its wake: Rybka, Hiarcs, Fritz, Zappa, Spike, List, and so on. I went through the Fruit 2.1 source code forwards and backwards and took many things. It is a bit of a pity that Rybka won't make the same contribution to the computer chess community, but at the moment I must also think about protecting my secrets. It's the eternal struggle for a computer chess programmer.
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