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Subject: Re: Tough problem from a Joel Benjamin game

Author: Amir Ban

Date: 03:44:45 12/21/97

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On December 20, 1997 at 13:46:45, Howard Exner wrote:

>On December 19, 1997 at 23:41:02, Bruce Moreland wrote:
>
>>
>>On December 19, 1997 at 19:46:37, Howard Exner wrote:
>>
>>>Note the Bxg2 on the second move. Maybe B-g7 is better since it seems a
>>>necessary defensive move (it is also played in the eval's above). There
>>>doesn't appear to be anything better for white than b6 (d6?  Qa7). I
>>>actually prefer the move Bg7 since it is more subtle, unless I'm missing
>>>some deeper defense by white (some other move other than b6).
>>
>>Does Rebel ever play Bxg2 at the root?
>
>These are the results of 3 seperate "power analysis"
>searches for Rebel 8. Based on these Rebel will not
>play Bxg2 at the root.
>
>        Eval
>Ply	Bg7	Bxg2	Kh8
>10	2.26	1.56	2.02
>11	2.34	1.86	2.03
>12	2.61	2.32	2.32
>13	3.41	2.62	2.05
>
>What does Ferret do after you enter Bg7?
>Will it play b6 for white and
>Bxg2 for black?
>
>Looks like Rebel 8 would have won this game(under 40/2 conditions) as
>Joel Benjamin did 13 years ago but with a
>transposition of moves.


I get Bxg2 after 6:30 min in one run, after 3:00 min in another with a
score of +1.95 on P6/200. However, if I play Bg7 and analyze from there,
it looks even better (Bg7 b6 Bxg2 ... +2.80). If I play Bxg2 and
analyze, I see only +1.80 (Bxg2 Kxg2 e4 {if Bg7, Rc2} d6 ...).

Maybe with a deeper analysis, the difference between Bxg2 and Bg7 will
become academic. Black wins in both, it seems.

Amir




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