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Subject: Re: a question to Tord about detecting threats in null move

Author: Sune Fischer

Date: 17:26:26 10/04/03

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On October 04, 2003 at 19:45:25, Vincent Diepeveen wrote:

>So you go 1.h3 the opponent directly reacts and plays within a flash of a second
>out of his book 1..e5
>
>You hope to confuse your opponent and play 2.a3 and avoid your opponent from
>saving time by book. With the usual confidence of an Uri (because who else on
>the world would be crazy enough to play h3? and a3?) you happily laugh to the
>left and right. After a while you look again at the board and while swallowing
>the last remnants of your meal that morning you realize that opponent has
>already answerred instantly 2..d5 and that only YOU lost time.
>
>So a) you have a lost position
>   b) you you have a time disadvantage
>   c) you are very early out of book and the opponent has still
>      another 10 easy to find moves to play where you struggle and struggle.
>
>There goes all your advantages of surprise...

If you assume the opponent has a book that covers everything then there's not
much to be done.
However, if the plan works, he should be out of book early so the real fight
between programs (not books!) can begin.

>I remember that i surprised some years ago some engines with the very bad 1.a3
>then after 1..d5 which they all played diep would go 2.d4 and then pray the
>opponent was out of book.
>
>I even remember how i fooled Nimzo. It was just too plain aggressive psq
>program. I had figured out that after 1.a3,d5 2.d4,d5 3.Bd2 it would be out of
>book and give away a pawn at c5 directly. Then dxc5 and soon a3 c3 e3 and white
>would be a pawn up.
>
>However that doesn't work anymore for quite a few number of years already. The
>last time that something like this worked was like 1998 or so.
>
>That's 5 years ago.

Last I checked it still works, just doing stuff like 1.d4 2.c3 3.e3 4.Bd3 will
take many engines out of book.

>This just shows how important it is to visit world champs regurarly.

Yeah but world champs is not the only place to gather experience.

>Otherwise your 'tricks' are outdated quite some.

My experience is that blindly following long book lines against programs with
killer books, is certain death if your own book sucks. You _must_ deviate at
some point and let the engine take over, preferably before it's completely lost.

Just remember how Junior got smashed in the first game against Garry.
Great example of a bad book line, Junior went for a long think out of book, but
too late too little and the game was lost.

-S.



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