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Subject: Re: The world of AUTO232

Author: Robert Hyatt

Date: 06:26:54 09/29/99

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On September 29, 1999 at 08:30:23, blass uri wrote:

>On September 29, 1999 at 03:14:06, Ed Schröder wrote:
><snipped>
>>#1. In rare cases I have seen Rebel's NPS drop with a factor of 3 during
>>an auto232 match. Thus playing a match on a PII-450 the machine at some
>>moment in the auto232 match the PC Rebel was running suddenly behaved
>>as a PII-150 machine. The factor 3 is remarkable because it is an indication
>>it smells to hardware and not to software.
>
>The question is
>if the same thing does not happen practically rarely in games played manually
>
>The only way to know is to check hundreds of games played manually.
>
><snipped>
>>#4. I have seen Rebel (and other programs) play moves that couldn't be
>>reproduced while Rebel is programmed to do so. I have not much of such
>>cases but the fact it happens isn't a funny thought as you don't have
>>the time to check every auto232 move.
>
>Again the same question.
>
>Uri


I can answer that.  Crafty would hang in every game played where it started
probing tablebases.  It would occasionally play a move that was not in the
log file.  IE the log would say it played move X, but in the game from the
other program, the move was Y.

It _never_ does this using winboard/xboard playing on ICC.  After tens of
thousands of games...



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