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Subject: Re: Draw detection(crafty) (more info)

Author: Robert Hyatt

Date: 14:45:49 02/04/03

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On February 04, 2003 at 17:27:48, Jarkko Pesonen wrote:

>Do you have any idea how sophisticated these extensions has to be
>not to slow down other searches because ruffian is very quick
>in many tactical positions and doesn't seem to slowed down
>very much.
>
>Is increasing check extesion e.g. from 60 to 120 in crafty
>what you mean.

Yes although you can't do that without modifying the source, as extensions
are limited to no more than one ply at any ply in the tree.  However, some are
less than 1 and they can be increased.  one legal reply to check is one example,
as is the recapture extension, both of which are .75 ply by default.



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