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Subject: Re: CSTAL2??

Author: Dave Gomboc

Date: 16:57:28 05/11/99

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On May 11, 1999 at 18:37:50, Dann Corbit wrote:

>On May 11, 1999 at 17:26:18, Dave Gomboc wrote:
>[snip]
>>Chess knowledge is already being incorporated into the programs.  It is just as
>>important to not waste time incorporating chess knowledge that the search would
>>have figured out on its own with less cost.
>>
>>Every talks about a branching factor of 30, or 35, or 28 (your number).  But
>>really, it's about 2-4 in today's programs.  Still exponential, but it's clear
>>that this makes "eventually" even more eventual. :-)
>It can only examine 2-4 choices if it does things like null-move pruning and
>other tricks of that nature.  This means that it only works "most of the time"
>and fails sometimes.  I think that engineered zugzwang positions may be a very
>good way to defeat most chess programs.

Zugzwang positions are very rare in Chess.  It's more common that there is just
no good way to improve a position, but null-move will still work in these
positions.

Dave



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