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Subject: Re: Tiger, Goliath and Crafty in tactical comparison

Author: Robert Hyatt

Date: 06:45:09 06/13/01

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On June 13, 2001 at 06:14:37, José Carlos wrote:

>
>  The interesting thing of the graph is the shape of the curves. Although the
>x-axis scale is not constant (which makes the "Crafty gets more positions almost
>linear" statement not correct) the shape of the curves show different strength
>increase with time for the three programs.
>  Of course, you can argue that this is just a test, and doesn't prove anything
>itself. And I agree with that. But it will mean something _if_ further tests
>give similar results.
>
>  José C.


Note that linear does not mean "perfect".  IE if you search twice as long
and every time you double the time, you double the number you get right,
that is linear.  But if you double the search time and you get 1.2 times
more correct answers, _that_ is also linear.  Linear is a straight line. It
doesn't have to have a slope of 45 degrees..

IE in the "Crafty goes deep" experiment done by Monty Newborn, the number was
something like 15% better for each additional ply of depth.  That is still a
linear curve.



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