Computer Chess Club Archives




Subject: Re: The Code for the Rybka-Mate-Bug

Author: enrico carrisco

Date: 08:53:28 12/13/05

Go up one level in this thread

On December 13, 2005 at 09:38:12, Chrilly Donninger wrote:

>On December 13, 2005 at 09:22:03, Eduard Nemeth wrote:
>>Hello Chrilly,
>>thanks for your serching. Nice.
>>But please search in the code of Fritz 9, I seems Fritz 9 have now 1000 Bugs
>>(not only 100) ! :-))
>Who on earth is Fritz? Nobody would be interested if I would post a bug of this
>noname programme. I was also not asked by the Hydra-sponsor about Fritz. He
>wanted to know whats special about Rybka. So I have to find out. So far the only
>special thing I found is the mate-bug.
>Probably you are right: The secret of Rybka (and Fruit) is the low bugs/second
>count. Thats a much more interesting figure than the Nodes/Sec.

I find it odd that Rybka's PV and nps are short and nps seems to be manipulated
-- either that or sometimes its eval time varies dramatically.

Maybe it gets its PV from the hash and does not hash in the Q search?




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