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Subject: Re: Crafty 19.10

Author: Mike Byrne

Date: 16:03:56 02/01/04

Go up one level in this thread


On February 01, 2004 at 12:50:11, David Dahlem wrote:

>On February 01, 2004 at 11:48:39, Mike Byrne wrote:
>
>>On February 01, 2004 at 11:18:45, David Dahlem wrote:
>>
>>>I see the source for Crafty 19.10 is now available at ....
>>>
>>>ftp://ftp.cis.uab.edu/pub/hyatt/v19/crafty-19.10.zip
>>>
>>>What are the changes in this version? Is this the version playing in CCT6?
>>>
>>>Regards
>>>Dave
>>
>>from main.c:
>>
>>
>> *******************************************************************************
>> *   19.10   a fix to the EvaluateWinner() code to recognize that while KRB vs *
>> *           KR can not normally be won by the KRB side, we require that the   *
>> *           KR side not be trapped on the edge of the board, where it can be  *
>> *           mated.  FUTILITY code put back in.  19.9 will be the SE version   *
>> *           for those wanting to play with it.  new "learn" command option to *
>> *           allow the user to set the position learning parameters that are   *
>> *           used to trigger position learning and disable position learning   *
>> *           after the game is already lost.  the command syntax is as follows *
>> *           "learn trigger cutoff" and are expressed as fractions of a pawn   *
>> *           with a decimel point.  the default is learn .33 -2.0 which says   *
>> *           to do position learning when the score drops 1/3 of a pawn, but   *
>> *           turn it off after the score reaches -2.00 as the game is already  *
>> *           lost and learning won't help at this point.  this is the CCT-6    *
>> *           version exactly as played in the CCT-6 tournament.                *
>> *                                                                             *
>> *******************************************************************************
>>
>>I had not realzied that there was newer version --- so Crafty 19.09 SE will not
>>be released :(
>>
>>-- I will start working on Crafty 19.10 SE,  since this version appears to be
>>the "keeper" here.  All my changes made to 19.09 will be carried over to 19.10
>>SE  :>)
>
>Do you recommend deleting the old position.lrn file, since this version has a
>new learn command option?
>
>Regards
>Dave

yes ..I would delete the the *.lrn file for every version -- because every
version has the potential to evaluate things differently - no sense in mixing
apples and oranges



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