Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: a standard for evaluation score.

Author: Robert Hyatt

Date: 18:50:55 05/18/00

Go up one level in this thread


On May 18, 2000 at 05:57:05, Masciulli Gianluigi wrote:

>All the evaluation score, more or less, are based on the pawn value.
>that's fine but suppose is the black to move:
>some program (type A) say's +1.00 when  white is better a pawn
>and some other program (type B) says the position is -1.00 seeing form
>side to move perpective.
>the type b approch is quite disturbing while you analize a game (exemple giving)
>with a program like crafty that will do something like this
>

Use winboard/xboard.  Then crafty doesn't do this.  It always displays
evaluations with respect to +=good for white, -=good for black, no matter
which side is to move.

Also when it annotates a game it uses the same approach.

I have on my to-do list to standardize _all_ evaluation output with respect
to white.  I too think it is confusing.  Of course, you will then see crafty
playing black against you, with a score of -3.5 and you will think you are
winning.  :)




>
>
>
>+1 34)Ne4
>-1 34) ... Nf3
>+1 35)Ne2
>+4 35) ... Bh2
>-1 36)Qf2
>-1 36) .. Rh7
>-2 37)Ka1
>
>considering the side to move look a bit confusing for me
>WHY not settle (TYPE A) as a standard so an analisys like
>
>+1 34)Ne4      :white ok
>+1 34) ... Nf3 :nothing new
>+1 35)Ne2      :nothing new
>-4 35) ... Bh2 :bad surprise for the white black: can kill him
>-1 36)Qf2      :missed to do so but...
>+1 36) .. Rh7  :white ok again
>-2 37)Ka1      :black is really better now
>
>..and so on
>
>
>teh situation is horrible when i dont know the type of the program
>sometime I find on CCC posts that say:
>
>
>"my program say that position is a -2.45"
>
>so i have to go to the post with the position anddiscover
> 1) what the side to move
> 2) what type is "his" program (some time is not so easy to discover this :(
>
>Setting (TYPE A) as standard may be much better for lazy people like me.
>In any case, even if most of the program like (TYPE B) more, A standard is
>better than NO STANDARD!!
>
>
>ciao
>
>glm



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.