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Subject: Re: AMD Optimized Crafty v18.12

Author: Robert Hyatt

Date: 05:53:20 10/18/01

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On October 17, 2001 at 14:27:21, Ian Aston wrote:

>On October 17, 2001 at 11:19:46, Robert Hyatt wrote:
>
>>On October 17, 2001 at 04:04:35, Aaron Gordon wrote:
>>
>>>AMD (Athlon, Thunderbird, Duron, etc) optimized Crafty v18.12 available here at
>>>http://65.10.79.9/crafty/index.html .
>>>
>>>For those with Pentium 2's or 3's, Celeron's, Pentium 4's, etc it should run
>>>fine so don't worry.
>>
>>
>>I should explain that this is a "test version" of Crafty.  The main change is
>>that it uses the "deep blue" extension limit rather than the old method.
>
>Does this mean that it can beat Kasparov? :)
>

At blitz, the _old_ version would do just fine.  :)

>>
>>Old:  at any ply in the tree, the extensions could not add up to greater
>>than one ply.  This means that if white checks black, then the move by
>>white would extend 1 ply.  If it was also a recapture, the recapture could
>>not be done since one ply is the max extension at one ply.
>>
>>New:  Two consecutive plies can not produce more than 2 plies of extensions.
>>It "averages" the same of course, but now a check and recapture can both be
>>applied if the previous ply had no extension to speak of.
>>
>>I am looking for feedback to see whether this is better or worse than what I
>>was doing before.



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