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Subject: Re: 24 interesting endgame positions

Author: Bruce Moreland

Date: 11:37:18 10/13/98

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On October 12, 1998 at 14:25:08, Ernst A. Heinz wrote:

>With the help of its interior-node recognizers and its endgame databases
>"DarkThought" solves 23/24 at 60 sec. per move on a 600MHz Alpha-21164a.

I would like to ask you to supply more details about the recognizers (yes, I
read your paper).  When you use tables at the tips, you need to have some means
of dispatching into the right table.  If the tables aren't present, you can use
the same dispatch mechanism to get you into the right routine appropriate to the
situation.  So, for instance, mine understands that it is supposed to use a
table for KRN vs KR, but if the table isn't present, it goes to some other
routine that returns something close to a draw value.  I invented this myself,
but I am sure that others invented it independently.

Do you have special routines for higher material cases, for instance K+P endings
with many pawns, or rook and pawn endings with many pawns?

bruce



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