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Subject: Re: Crafty and Cray Blitz Questions to Prof. Hyatt

Author: Robert Hyatt

Date: 07:09:15 10/11/00

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On October 11, 2000 at 00:24:37, Joshua Lee wrote:

>O
>>Something is wrong.  Chiptest didn't play in the 1986 WCCC event.  It played
>>in the 1986 ACM event, but Cray Blitz didn't.  It sounds like you are looking
>>at the 1987 ACM event where CB changed from Ne6 at the last minute and played
>>something that lost, due to some unknown parallel search glitch?
>>
>>But no Chiptest on Germany in 1986, which was the set of games I used for the
>>test I mentioned.
>
>
>it was an ACM event the 18th well i do remember in this book by Monty Newborn
>that different "Teams" were having parallel search problems so i can believe
>it...but even so I looked at this with crafty and it's not playing Ne6 ....to
>deep  it was 5 or 10 minutes on a pentium 500 but the 17-13 version isn't
>optimized for chessbase so i wouldn't put too much stock in this so i use 17.10
>i could use 17.11 but i noticed something weird it loads up and flashed crafty
>17.10 loading but then in the main window it says 17.11    i think someone at
>ChessBase screwed up... anyhow it said Depth 13/25 i wasn't in a rush to let it
>think for half an hour so i left it at that.... The main thing to say is  Crafty
>does a good job of predicting Cray Blitz moves and given time it would make as
>good if not better moves in my opinion.
>
>


Ne6 is definitely a winner.  both CB _and_ chiptest saw it.  But we changed
at the last second, yet after the tournament we re-ran this position so many
times we stopped counting and it _never_ shifted off of Ne6.  We later found
parallel search bugs, but never found one we could _prove_ caused the change
from Ne6.

I haven't tried this position on Crafty.. but as I said, CB would probably have
a tactical edge, Crafty would have a knowledge edge, particularly in endgames.
I wouldn't be surprised if CB found some moves way quicker than Crafty, but I
_would_ be surprised if the inverse happened.




>one position doesn't say much but i think it is a good guess besides you've come
>to similar conclusions years ago.....
>
>
>Thankyou again Prof. Hyatt
>
>If you think of anything that may intrest me let me know



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