Author: Bryan Hofmann
Date: 15:40:08 02/04/04
Go up one level in this thread
On February 04, 2004 at 16:12:40, Robert Hyatt wrote:
>On February 04, 2004 at 10:56:01, Bryan Hofmann wrote:
>
>>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.
>>
>
>Not sure what you mean by "strange". I said it turns off some asymmetry dealing
>with blocked positions. That is what pawn rams are. :) One component of the
>"blocked position" stuff. I think/thought I used to turn off more, but that has
>changed a lot over the past couple or three years so maybe not.
>
Ok, I see what you are saying now, missunderstanding of terms I guess.
>
>>
>>
>>/*
>> ************************************************************
>> * *
>> * 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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