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Subject: Re: Rebel experts: Why doesn't my rebel reproduce this move from Aegon 97??

Author: Dave Gomboc

Date: 00:07:58 08/20/99

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On August 20, 1999 at 03:01:10, Eelco de Groot wrote:

>If I've got the position epd copied correctly, this is what standard Rebel 9
>plays:
>
> 9.00 -0.07 Rf8-c8 Rb1-b2 Rc2-c7 Nd2-e4 Nd6-f5 d5-d6 Rc7-c2
>10.00 -0.08    "      "      "      "      "   Rb2-e2 Ba7-d4
>11.00 -0.04    "      "   Rc2xb2 Ba1xb2 Rc8-c2 Bb2-a1 Nd6-f5
>
>Could it be that in the Aegon Tournament a small bug in the en passant
>programcode (maybe just for Black?) was discovered? Just a guess. It's a
>notorious place for bugs to hide for years, then to show up preferably during a
>very important tournament, according to Christian Donninger (Nimzo's
>programmer). On his homepage you can read his article on several sorts of (chess
>programming) bugs, if you can read German.
>
>Shep, what was the "infamous hash influence" in games with PB on? Does PB stand
>for Pawn Base?

"PB" is an abbreviation for "permanent brain", a rather odd term (at least in
English!)  When "PB" is active, the machine will calculate even when it is not
its turn to move.

>
>Regards,Eelco.

Dave



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