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Subject: Re: Is there going to be a Rebel XP or did ed Shroeder Retire?

Author: Marc van Hal

Date: 05:47:28 06/24/02

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On June 24, 2002 at 03:26:22, Christophe Drieu wrote:

>From last news(chessbit), Ed is working so hard on Rebel XP that he can't do
>anything else !
>
>If this news is not a joke, and i think it is not, Ed can take all the time he
>need for give us the best engine !


I simply gues he is testing what are the best knowledge settings
You could experiment with this yourself if you own Rebel Century4.

ok i will tell something of the experiments I had
Something I already was doing after Thorsten mentioned about his personelety
setting.
Some bugs of Rebel will stay no mather how you put them
with bugs I mean the understanding of good and bad pawn positions
especialy doubled pawns.
this can be slightly solved by putting the valeu of passed pawns and
pawnstructure to 106
but is still far from perfect
this also has nothing to do with the positional knowledge
and serach methodes wich you have to enter with edit or notepad

At the moment i have a setting which is not as fast in ply but ahead in simple
tactics.
The trouble with this seting is if there is a verry tactical position
it will slowdown extremely about 8 plys is as deep as it gets.
later on i made it instead of using deep search nulmove search to overcome this
But many of the good things get lost then too.
It many times starts to screw up in the end of the game
While having a clear advantage.
I actualy found out that Rebels main problem is the early endgame.
I mean when the transposition from middle to end game just started
using the knowledge setting for this does not help fully
But it does help a bit.
But i could not make the program play in the style I wanted though prety close
to it.

I also have to say that the exeperiment does not work in the way what you see is
what you get.
Just like it was not with rebel Century3

Regards Marc van Hal



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