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Subject: Re: Test Suites

Author: Russell Reagan

Date: 17:38:03 12/08/03

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On December 08, 2003 at 20:27:33, Steven Edwards wrote:

I like the NATS idea.

>One plan is to categorize position difficulty based on
>
>    d = log N     d: difficulty    N: node count to solution

Would the method for counting nodes be standardized? Some count nodes
differently than others. For instance, one might not count the nodes visited
during a null-move search and instead count the root node from which that
null-move search was performed as a single node. Some programs do a great deal
more work per node. Maybe more than one metric should be used. I think time is a
better one than nodes. Nodes seem dependent upon the design philosophy of the
engine writer.

The times would go down as hardware gets faster, but that is part of the point
of test suites, to determine how computer chess has advanced, and hardware is a
part of that equation.



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