Computer Chess Club Archives




Subject: Re: Secrets of Rybka and Fruit from my point of view

Author: Zappa

Date: 08:15:36 12/16/05

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On December 16, 2005 at 11:11:31, Claude Le Page wrote:

>I omitted to say that my tests were made in 15'+ 10" , what is "rapid" , but not
>so much a blitz
>Now , the cut was not between Fruit 2.1 and Toga 1.0 , but between TogaII 1.0
>and Toga II 1.1 , with a complete change of style as if Hiarcs had been
>converted in Junior ; moreover speed has been much increased : it needs much
>less time to go to depth 20 in infinite analysis : now it is about as fast as
>So the change must have been much deeper
>But TogaII is Open-Source , so it would be easy to see what changes were made
>between 1.0 and 1.1

Actually history pruning is at its most effective at this timecontrol :)  Toga &
Fruit only HP if depth >= 3.  So the best case for Toga is when it gets 14-15
ply and its opponent gets 11-12.


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