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Subject: Re: Crafty

Author: Carsten Kossendey

Date: 13:32:57 11/02/98

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On November 02, 1998 at 12:32:00, Hans Havermann wrote:

>Looking at the log file, Crafty tried some six positions with "depths" going
>from around 32 to 60, with only one variation ever considered. [Perhaps, it's
>the memory allocation: Minimum 103M, Suggested 175M!]

It is indeed a memory problem, but it isn't related to the amount of memory
allocated. Older versions of Crafty (including 15.4) had the bug that they
assumed newly allocated memory to be filled with zero bytes, which is not the
case. Since the memory location in question decides whether the search should be
terminated instantly, your odds are 1 in 256 to get a working version. The
general idea here is to zero the memory where Crafty will load, which can be
achieved by various means, the easiest of them being cold booting your machine.




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