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Subject: Deep endgame problems

Author: Bas Hamstra

Date: 07:50:39 10/18/99


There are several endgame positions in the wac testsuite that my program takes
many seconds to solve. I saw Crafty solves some of those instantly (an old
Crafty, without tb).

How does Crafty do that? I tried to use various promotion extension schemes (eg
pushes of freepawns), but they are not of much help.

Is it just square of the pawn (sotp) endgame eval stuff? I don't have it.
Because I thought in most endgames there are more than only a few pawns and 2
kings, and then things get too complicated. When there is for example a knight
somewhere this sotp code would be useless, no? Or at least very complicated.

How much would this sotp eval help the average endgame when there are also a few
minor pieces on the board?

And are there more tricks to see guaranteed wins quick other than tb?


Regards,
Bas Hamstra.















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