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Subject: Re: Chess Tiger & Fritz - question re nps vs. chess knowledge

Author: Uri Blass

Date: 11:41:56 06/20/01

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On June 20, 2001 at 14:25:03, John Hatcher wrote:
<snipped>
>Since, as I understand it, "nps" is related (at least nominally) to search depth
>in a given time period, it would seem that, all things being equal, the greater
>the "nps" the stronger the program.

nps do not relate to search depth.

A program that searches less nps can search deeper thanks to better order of
moves or better search techniques(pruning or extensions).

The main problem of chess programs is that they search illogical lines.
If program knows to reduce the number of the irrelevant lines that they search
they can search deeper inspite of searching less nodes per second.

Another point is that I am not sure if nodes of Fritz has the same meaning as
nodes of Tiger.

nodes mean moves but the moves may be illegal and it is not clear that different
programs generate exactly the same illegal moves.

Uri



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