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Subject: Re: Crafty 17.13 - re-importing FEN files?

Author: Robert Hyatt

Date: 19:07:39 11/08/00

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On November 08, 2000 at 18:04:24, J. Wesley Cleveland wrote:

>On November 08, 2000 at 16:49:33, Robert Hyatt wrote:
>
>[snip]
>>You can't save the current position while a search
>>is in progress.  The internal board is modified by the search.  I would guess
>>this is what you are doing.  IE it can't be searching, it can't be pondering,
>>it can't be analyzing, etc.  There is only one copy of the board, and saving
>>that in mid-search will produce garbage.
>
>Would it produce garbage, or would it save some position that came up in the
>search ? I would like some way to save certain positions that arise during the
>search, e.g. positions that cause null-move failures.


It could produce garbage, since this could be done while other processors are
still searching.  On a one cpu machine, it could still produce illegal
positions since they are common in the q-search in wild positions.  In short,
no telling what you will get out.  On a multi-headed machine, possibly a
position that could not possibly occur, or just an illegal position as happened
in the above case if you don't have more than one cpu.

Some of this is fixable, and I have added it to my to do list, but for the
current version, it will screw up.



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