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Subject: Re: DT and DB (prototype) vs Computers

Author: Ernst A. Heinz

Date: 11:52:48 01/25/00

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On January 25, 2000 at 14:37:56, Robert Hyatt wrote:
>
> [...]
>
>B* certainly didn't use SE.

The B* driver not, of course. But the version we played employed
the normal alpha-beta "Hitech" to perform the necessary probe
searches of 2-3 plies. If the normal "Hitech" did singular
extensions, then the probe searches of "Hitech B*" ought to have
done them too. Actually, it was the pb-B* version of "Hitech B*"
that we played.

>Generally SE is dangerous in endgames as well, as too much gets extended, and
>the overhead isn't worth the effort spent...

Right.

>so it is likely what you played had no SE of any kind...

Yes, I strongly suppose so.

>I do remember that he originally asked some of your group to develop a fast
>engine for him to produce the bounds that B* needs, didn't he???

Yes, but somehow Markus and I (especially) were not the right kind
of people to cooperate with him. We obviously had too much of an
ego ourselves and Berliner was not able to cope with this fact.

>That should put a
>time-frame for dropping the original hitech with SE in favor of B*.

Not really, because the original "Hitech" was already dropped somehow
in favour of pb-B*.

=Ernst=



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