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Subject: Re: More on Rigged Opening Books

Author: Ricardo Gibert

Date: 01:46:10 05/31/01

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On May 30, 2001 at 13:57:54, Dana Turnmire wrote:

>   This article appeared in the 1996 issue of Computer Reports and was written
>by Michael Byrne.  It shows me the only fair way to find an engines true
>strength is WITHOUT the opening book.

[snip]

I disagree. If you compare programs without their book, you will create a
different kind of problem. A programs eval can aslo be tuned with respect with
the book they have. In other words, the book steers the position towards the
type of position that the programs eval can assess accurately. This is perfectly
legitimate. Human players do the same. As a human player, I try to play openings
that steer the game towards positions that suit my style. If you test without
book. The programs will end up in types of positions they would normally not get
into. You will not get a true measure of their playing strength. What you will
measure is the ability of program to analyze an arbitrary position. This is
worthwhile to know if that is how you are going to use a program, but it should
not be confused with playing strength. They are not really the same.

If a program is susceptable to "rigged" opening books, that is the programs
weakness and is fair game to take advantage of. Such programs should be enhanced
so that they are less susceptable to such an attack. The way programs are
currently tested and assessed encourages programmers to develop countermeasures.
From this point of view, it is clear that the current way of testing is really
just fine. Creating an artificial setting to test programs will only result in
artificial results playing strength-wise.



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