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Subject: Re: Mobility in Chess Evaluation Function at terminal-nodes

Author: Stuart Cracraft

Date: 10:52:49 12/29/05

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On December 29, 2005 at 05:58:50, Uri Blass wrote:

>On December 29, 2005 at 05:56:33, Uri Blass wrote:
>
>>On December 29, 2005 at 05:02:36, Tord Romstad wrote:
>>
>>>On December 29, 2005 at 04:49:09, Gian-Carlo Pascutto wrote:
>>>
>>>>On December 28, 2005 at 16:04:28, Tord Romstad wrote:
>>>>
>>>>>Perhaps you can even omit some
>>>>>piece types.  I don't evaluate pawn or king mobility at all (in my
>>>>>experience, there are better ways to evaluate king activity), and I
>>>>>have never seen any measurable difference in strength when I
>>>>>switch queen mobility on or off.
>>>>
>>>>What about knights?
>>>
>>>Good question.   I have never tried disabling knight mobility, but
>>>it is perfectly possible that a piece square table with high values
>>>for central squares would work just as well as pseudo-legal
>>>mobility for knights.
>>>
>>>Tord
>>
>>My mobility for the knight is legal mobility.
>>Knight that is pinned get no bonus.
>>
>>Uri
>
>When I think more about it I will need to give it negative score when I change
>my mobility evaluation because today I give every side bonus based on the number
>of all moves and I plan to change it to bonus based on the number of all moves
>relative to material(similiar to fruit)
>
>Uri

By "all moves relative to material" what do you mean?

Stuart



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