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Subject: Re: History heuristic

Author: Sergei S. Markoff

Date: 05:44:24 03/18/04

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Hello!

>I see king knight in the same group.
>pawn bishop in the same group
>I understand that the logic is that moves of this pieces that are not captures
>by pawns have to be different and captures by pawns are not relevant because
>they are always considered as good captures(there are cases when they are bad
>and it may be better to escape with the queen if the opponent threats it but
>Crafty does not generate escapes first)

Yes, you're right. Threats detection also can be used to improve move-ordering.
If threat is capture we must try (with larger priority): moving piece away (with
SEE>=0) and protecting piece (if threating piece is more or equal valuable as
threaten). Also we must try some checks before other moves. I'm experimenting
with it.

Best wishes,
Sergei




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