Author: Bryan Hofmann
Date: 07:56:01 02/04/04
Go up one level in this thread
On February 04, 2004 at 09:49:37, Robert Hyatt wrote:
>On February 04, 2004 at 06:16:53, Mike S. wrote:
>
>>In the Crafty doc, I found:
>
>>
>>Does the search and evaluation remain the same (so that results from test suites
>>should be the same), with or without computer option?
>
>No. "computer" also disables some asymmetry in the evaluation that is more
>important when playing humans that want to "close" the position whenever
>possible.
>
Strange, the only thing I see is the follow for pawn ram penalty that is not
calculated if the computer command is used.
/*
************************************************************
* *
* now add in the pawn ram penalty. the idea here is *
* that rams hinder tactics by blocking the position, *
* which sidesteps the computer's strong point. *
* *
************************************************************
*/
if (use_asymmetry && !computer_opponent) {
if (root_wtm) {
if (TotalWhitePawns > 5)
score -= pawn_rams[PopCnt(WhitePawns & (BlackPawns << 8))];
} else {
if (TotalBlackPawns > 5)
score += pawn_rams[PopCnt(WhitePawns & (BlackPawns << 8))];
}
}
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