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Subject: Re:

Author: Robert Hyatt

Date: 05:10:06 11/12/98

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On November 12, 1998 at 05:05:33, CONNAT wrote:

>>
>>Is this not the move where it chose to go into "panic time" because the eval
>>kept dropping iteration by iteration, and it changed to Be4 at the last minute?
>>
>>There is definitely a draw to be found... just let Junior search... for a day or
>>so.  You'll get 0.00 eventually.  I did...  And I assume they did as well to
>>change to something else...
>
>Hello Robert,
>
>Please can you explain what you mean by "And I assume they did as well to
>change to something else..." ?
>
>Do you mean that 'they' is DB's team ? For example an operator who could change
>settings during games or operate something like : 'Play second best move' or
>something else ? Or force DB to play a move by 'Play now' ?
>
>This wouldn't be 'Real chess' :)
>
>Eric.


No, what I meant was they found that Qb6 dropped each iteration, until their
program finally decided it was bad enough that it changed (by itself) to Be4
instead.  When I ran this on Crafty last year, it seems to me (if I recall
correctly) that this move dropped to 0.00 at iteration 20 or 21, and that Crafty
then switched to Be4...   I ran two copies of crafty simultaneously on different
machines, one searching *only* Qb6, the other searching *only* Be4 to run this
experiment... so I could compre the scores...  Be4 was always just above
zero, while Qb6 started off at around +1.x but slowly dropped... by the time
it hit either 20 or 21 plies, Qb6 was 0.00 and Be4 was still slightly positive.

So no I didn't mean the "humans" helped... I was referring to the program...

Bob



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