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Subject: Re: ply search vs elo rating

Author: Jeremiah Penery

Date: 07:35:32 10/19/99

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On October 19, 1999 at 10:30:18, rich buska wrote:

>i understand that is a 1/2 move but what does equal in elo
>
>2 ply 1100 ?
>4 ply 1400  ?
>6 ply 1600?
>8 ply  1800? etc?

I don't think you can say for sure.  A lot of it depends on the quality of the
static evaluation within the individual program.  A program with a very simple
evaluation (Fritz, maybe) will do much worse with 2 ply than a program with a
larger evaluation (Hiarcs, CM, Rebel, Crafty, etc.) doing a 2 ply search.  The
way Fritz (or other programs) can make up for this is with extensions, which
will greatly influence this.  The more extensions done (in lower search depths),
the better the program will play. [Because in higher search depths, too many
extensions can stall the search, and make it play much worse, even.]

Jeremiah



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