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Subject: Re: Curiouser and curiouser.....

Author: Peter Fendrich

Date: 16:47:09 05/14/05

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On May 13, 2005 at 19:51:35, Christopher Conkie wrote:

>Hello Peter,
>
>Why does the figure 31900 get used although?
>
>Dann said it was centipawns down below in another message meaning that it
>thought it was a knight ahead.

That must be wrong if the scores are from Arena.
Arena shows the given value/100.
Now this could be the end of story but it isn't...
Skaki sends 10000 as the mate value and Arena does something very strange here
and translates it to 31900.
It is Arena who selects that value! Skaki uses 10000.

>But you think it is an expression of Mate in 1 with a value of 31900?
It should be :-)

>Why 31900?
Well, in the winboard protocol there is no standard for mate values. The engine
can select any value as mate, normally something very high. Many engines have
32767 the hihgest possible signed 16-bit value in town.
31900 is as good as anything here. Terra uses 30000.
Now, this time Arena made his/here own choice as explained above.

>I'm just wondering why?
>
>Any ideas?
>
>Also do you have a copy of Averno 0.2x?

I have almost no engines myself except from my own and a few test competitors.
/Peter

>I'd love to look at that.
>
>Regards
>
>Christopher




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