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Subject: Re: u2600 Club Rating List - Jan 25

Author: Andrew Williams

Date: 09:14:12 01/25/99

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Will,

>I put a new version on, which finally has eliminated all ply 1 scoring terms.
>That enabled me to add the "valid" part of the hash lookup (not possible with
>interior node scoring), and both together have sped it up and improved play.
>The pv in particular is more reasonable, and I get more correct guesses on the
>opponent's move.
>

Yes. This is what I have been doing over the last couple of months. I too
had a lot of ply 1 (and 3) bonuses, which I took out after your question in
this group a few months ago. This forum really works.


>But, more likely, it was just a fluke. <g>  The first game I recall you put all
>your pieces back on your first rank, then a kside attack got you.  The second
>game also had a kside attack, I think.  Any changes in that area?
>

Two main changes recently:

1) I now use TT information from previous searches. I just clear the TTs
when I enter the endgame and after either side castles.

2) New pawn scoring, which is specifically intended to stop the sort of thing
you describe above.  This needs tuning I think!


Andrew



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