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Subject: Re: Knowledge in Searching

Author: margolies,marc

Date: 15:11:02 03/11/04

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Hi bob,
while uri can best explain Uri's intentions to you, I did read that thread.
the programmers were talking about pruning. that is chosing which branches of
candidate moves to follow and how deep to do that. this is a multi-ply issue of
course.
In contrast an evalation function looks at a chess position and applies a
numerical function to it.
In practice, say you loaded an epd in chessassistant. you may directly tell the
gui which legal candidate moves to examine while ignoring others which are legal
but you understand to be fruitless options. And then you might want to specify a
ply-depth as well. I think this is what uri means by a searching function, only
in the specifics of this thread he means it to be coded into the playing engine
like the eval function.
best regards-marc



On March 11, 2004 at 17:45:55, Bob Durrett wrote:

>On March 11, 2004 at 16:54:19, margolies,marc wrote:
>
>>hi bob,
>>can you please make a citation of the post you were reading from. it might help
>>me understand your need better.
>>-marc
>>On March 11, 2004 at 13:55:45, Bob Durrett wrote:
>>
>>>
>>>A few days ago, someone was drawing a distinction between knowledge in
>>>evaluation and knowledge in searching.
>>>
>>>I am intrigued and very interested in knowing more about "knowledge in
>>>searching."  Some of the questions are:
>>>
>>>(1)  Is this commonly used or done in chess engines?
>>>
>>>(2)  What sort of knowledge would be used in or for searching, other than
>>>knowledge used in evaluation?
>>>
>>>(3)  How much can searching be improved by using knowledge in searching?
>>>
>>>(4)  Any other insights into this topic = ?
>>>
>>>Sincerely,
>>>
>>>Bob D.
>
>http://www.talkchess.com/forums/1/message.html?353971
>
>Uri distinguished between evaluation knowledge and search knowledge.
>
>[It took me awhile to find this bulletin.]
>
>Bob D.



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