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Subject: Re: piece values

Author: Bob Durrett

Date: 21:08:15 12/31/03

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On December 31, 2003 at 21:58:34, Toni wrote:

>On December 31, 2003 at 17:28:38, Bob Durrett wrote:
>
>>On December 30, 2003 at 22:04:02, Toni wrote:
>>
>>>I'm thinking about the values of pieces for a chess program. I have investigated
>>>some engines and the values they give to pieces vary. Some examples are:
>>>
>>>ENGINE          knight    bishop    rook    queen
>>>Faile 1.4.4      3.1       3.25      5       9
>>>Amy-0.8.4        3.5       3.5       5.5     11
>>>Crafty-19.4,     3         3         5       9
>>>Beowulf-2.2      3.2       3.25      5       9.3   (defult personality)
>>>
>>>I have to give values for my program and, as I'm not a strong chessplayer
>>
>>My guess is that being a very weak chessplayer would be a serious handicap.  If
>>this guess is true, then it might be a good idea to start devoting a certain
>>percentage of your time to the study of the game, especially study of strategy
>>and positional chess.
>>
>>Bob D.
>>
>
>Of course, you are right! In fact I expect an improvement in my level as a
>result of such studies
>
>Regards
>
>Toni

The point I was trying to make is that increased knowledge of strategic and
positional factors should help in the development of the position evaluation
[and searching!] because it would help to quantify factors other than material.
Piece valuation can be thought of as being a function of the position, but to do
that well would require understanding the positional and strategic factors which
could influence the value of the pieces and pawns.  Especially relevant are
factors which justify positional sacrifices.

Bob D.



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