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Subject: Re: New kind of books (was Re: M-Chess Pro7 : strength ??)

Author: Marty Hirsch

Date: 21:10:26 12/29/97

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The M-Chess Opening Book is specifically intended to get the program
into an active game with strength, complexity and variety, and to deal
effectively (so far as possible) with the most challenging countermoves
that may occur in each path.  The many countermoves that are considered
have come from a variety of sources including publications, humans and
computer programs (M-Chess and other programs).  There is a great deal
of variety in the MCP7 Tournament Book, not only in the first several
moves, but later on in many variations as well.

There are no "trap" moves played by the MCP7 Opening Book.  MCP7 is
well-prepared against a lot of good moves, and also ready for a number
of objectively worse moves that may either be tempting, plausible, or
challenging.

We DO NOT "go after" specific opponents looking for errors in their
books or play to capitalize on.

We do of course test our programs against various opponents, and hope we
are as solid as possible, upon release.

If we try an opening against a given opponent and do not like the
result, we may change the line, or not, depending on the circumstances.
On the other hand, we may win, but later decide that an opening is
unsound--there is a countermove that has not been played, but that could
defeat our strategy--then, generally, we change the book.

Sandro has included some practically complete games in the book.  I
think that is more book moves than are necessary.

I am greatly in favor of more opening variety, and I like the computer
learning features a lot.

It is risky to rely on published "theory" without first reviewing it
carefully.  The rise in computer chess strength has punched gaping holes
in so-called "theory".  The MCP7 Opening Library is an attempt to
improve on that.

Do I have any comments on what should or should not be acceptable in
book construction?  Yes, I do.  All weak and aimless moves should be
stamped out.

-Marty Hirsch, author, M-Chess Professional



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