Computer Chess Club Archives




Subject: Re: Zappa-Isichess

Author: Tord Romstad

Date: 06:54:11 08/20/05

Go up one level in this thread

On August 20, 2005 at 09:20:43, Robert Hyatt wrote:
>I do have a problem with programs that are using shared code for tasks
>that are not strictly one-answer tasks.  EGTBs are a counter-point, in that
>everyone gets the _same_ EGTB score whether they use Eugene's code, write their
>own probe for his tables, or write code to build their own tables.

It is not quite that simple.  First of all, it is not at all sure that everybody
the same EGTB score regardless of what code and tables they use.  The score
will depend on whether you use distance to mate or distance to conversion,
on whether you consider the 50 move rule, and on whether you have bugs
(we are talking about non-trivial code, after all).  An even more important
point is that EBGT probing in not only about getting the right result, but also
about getting the right result *quickly*.  It is not at all easy to compress the
EGTBs down to a manageable size and still be able to decompress and probe
quickly on the fly.

In my opinion, including Nalimov's EGTB code in the program is no better
(and no worse) than using a GUI book.


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