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Subject: Re: Your plans for the opening book?

Author: Tina Long

Date: 17:44:07 12/08/01

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On December 08, 2001 at 19:36:36, J. C. Boco wrote:

To Christophe:
>Could you share with us your plans for the opening book?  ARe you interested
>more in modifying the program rather than adding lines to the book?


To the Forum:
>Is there a
>consensus on this forum on what size an opening book is necessary to be
>respectable?


Hi JC,
"consensus on this forum" - I saw one once, but someone will try and say it was
twice.

The possibilities are:
No book whatsoever - I actually like that idea as long as there is some random
element in the early moves so the machine won't play exactly the same.  I
achieve this for fun games by turning off the book, but making the first few
moves manually from my own opening repetoire.

"Giant" Books - if you buy RebelCentury4 (as distinct from Gandalf5 with
RebelC4) you get a massive "55 million EOC opening repertoire" that (I believe)
has been hand-pruned so that only "good" moves are in there.

Selective Books - Rebel11 ff customers were given a subscription service which
included Opening Books of particular players Fischer Kasp. etc etc,

Strong Medium sized books - Hand pruned "tournament" books that contain only
"very good" moves.

"Killer" Books - There was suspicion about 3-4 years ago, that some programs
being given to the SSDF, had special Books that lead to positions that the
current top opposition did not perform well with.

What is Best? depends on what you want to do.

I want to be fun for a bigginer to play:  Very wide, not too deep.
I want to keep "reasonable" players entertained:  Gigantic book.
I want to beat strong players:  Very Strong Medium sized book.
I want to beat only Fritz: Specialist book based on knowledge of Fritz book.

In all cases the programmer needs to be aware of the type of positions his
program plays well (/badly) and use opening lines that lead to (/avoid) those
type of positions.

Just my Random thoughts,

Tina Long



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