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Subject: Re: Rybka uses PVS and not MTD(f). Its no Fruit-Clone

Author: Chrilly Donninger

Date: 04:26:38 12/12/05

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On December 12, 2005 at 05:19:49, Ryan B. wrote:

>On December 12, 2005 at 04:58:52, Chrilly Donninger wrote:
>>I did not follow the CCC-discussion the last months/years. So please do not
>>"kill" me if I am telling old stuff. I got questions about Rybka from the
>>Hydra-sponsor so I read yesterday evening some of IM Vasik Rajlichs very
>>interesting postings in the archive.
>>Vasik mentions several time MTD(f) and his experience with it. But when playing
>>with Rybka, it looks like a normal PVS-search. I looked therefore also in the
>>Rybka-Code. What I have seen so far is typicall PVS-Code.
>>From this first look I can say that Rybka is not at all a Fruit clone.
>You could look at Fruits source or just read the readme files :)

Well, for Fruit one has to know C. Quite a problem for an old Assembler-Hacker.
But in contrast to Frans Morsch I am in the meantime used to C.
Rybka is somewhat easier. There one can directly read the machine/assembler
code. No retranslation from C to Assembly is necessary :-)
Rybka is obviously written in C. It looks like gcc was used for compiling. The
code is not particullary well optimized. Maybe the Rybka team can buy from the
first royalities a professional one from Intel or Microsoft.


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