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Subject: Re: What is the limit of TB's?

Author: Angrim

Date: 04:55:43 05/17/00

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On May 16, 2000 at 20:47:06, Mark Longridge wrote:

>I'm wondering what the current practical limit of tb's.
>
>Have we reached that limit now with 6 piece tbs?

Yes, for now.  It will take quite a while to finish the 6 piece tables,
and the 7 piece tables are roughly 58 times as large each and there are
more of them.

>
>And why is one side often smaller than the other?

Because positions where the side to move is attacking the opponents king
are not stored. In a table with unbalanced material the side with
stronger material is has more positions where it is attacking the
opponents king.

> Can we use just one
>side, and if so, why even bother with the other?

We could store only one side to move, and only probe when that side
was the one to move, but we would have to do a lot more table probes
to get the same amount of information.

>And how about making "limited tb's" which only calculate from some positions,
>the positions most common in actual games. It seems to me you would get
>a lot of mileage out of these limited tbs, plus you could always add more
>starting positions later on.
>
>Mark

Angrim



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