Author: Mark Longridge
Date: 14:25:38 08/19/01
I'm having a bit of a problem with crafty 18.10, specifically it exits
early with "can not read memory at 0x00000000" error. I think possibly
my position.bin is too big, it's 114,472 bytes, although the docs say
this file can be as big as 1 megabyte.
The book.bin file is a bit over 5 megs in size.
The error message itself seems a little odd, and although crafty may
complete several games successfully, eventually the error will recur.
I'm not sure if it's my computer's memory at fault, or something is wrong
with my crafty setup. I have recompiled crafty, and also re-downloaded crafty
from Professor Hyatt's ftp site, but the error message keeps happening.
I've also noticed that after editing a game in winboard, and having crafty
play out the edited position I get:
q { -65 14 0 }
in the book.lrn file, and I'm not sure if this is part of the problem.
I'm also curious if crafty can learn from these experiments, that is it
continues to gain knowledge from playing out these edited games.
One thing I could try is deleting all position.bin and book.bin and playing
crafty against another engine. Then I'd at least know if one of those files
was to blame. These problem has only occured relatively recently. I've
ran crafty for weeks on FICS with no problems before. One thing different
I do now is trying to add to crafty's book once a month. I do this by
renaming book.lrn to book.l and position.lrn to position.l, delete book.bin and
position.bin and then regenerate the book by using all the games it's played.
Then I import position.l and book.l, but perhaps this isn't the best way to do
this? I'm trying to extend crafty's book knowledge, and yet still retain
all the learned info.
Mark
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