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Subject: Re: fractional extensions

Author: James Swafford

Date: 12:42:14 06/23/99

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On June 23, 1999 at 14:13:54, Alex Boby wrote:

[snip]

>
>   What exactly is the meaning of extending by 3/4 of a ply? Isn't 'depth' an
>integer argument to the search?
>


Depth is an integer argument, but depth=1 doesn't necessarily
equate to one ply of extra search.

For example, in my program a full ply of search is equal to 20.
If I ran across a situation that I only extended by 10 or 15, then
it would take another extension to push the depth variable "over the
limit" to generate another ply of search.

I haven't tested this exhaustively, but I started out extending
*everything* by 15 (3/4 ply).  After a while I just changed all
my extensions to 20 (1 ply), which yielded better results on
the tactical suite WAC.  I should go back and spend some time
testing, but haven't gotten around to it yet.

--
James




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