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Subject: Re: HOW does Chess Tal learn?

Author: Terry Ripple

Date: 04:14:32 07/13/99

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On July 13, 1999 at 07:03:27, Shep wrote:

>On July 13, 1999 at 05:10:41, Didzis Cirulis wrote:
>
>>Hi,
>>
>>When playing on FICS (Computer(c)) Chess Tal lost a completely won game due to
>>some mismanagement of time. It did run out of time. So how does this program
>>learn in this situation? Will this line be considered good or bad next game?
>>
>>One more question: What happens if I start a new game when I am going to lose
>>this one? Is program learning at all in this situation? Is this learning
>>correct?
>
>Ed wrote that at least for Rebel, learning works OK in that case, even if the
>game does not end by checkmate or resigning on your part.
>IIRC Crafty also handles learning depending on the evaluation only, not "3rd
>party effects" like running out of time.
>This is reasonable; imagine the opposite situation where you have a won position
>against the program and then lose on time or resign by accident...
>
>Another "out-of-time" learning problem is perceptible in the Fritz GUI:
>If you play against another program (regardless if manually or eng-eng) and
>allow the opponent's time to run out, the Fritz GUI will flag this game as won
>in its book learning.
>So you should always stop the opponent's clock with "Ctrl-Q" after the Fritz GUI
>has moved.
>And in eng-eng Blitz games, you should disable learning altogether because one
>engine may lose on time in a won or drawn situation (seen this many times in
>5-min Blitz).
>
>---
>Shep
----------
Hi Shep,
  Are you saying to disable Book Learning and Position Learning or just one?
----------
Regards,
Terry
----------



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