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Subject: Re: A Rybka Miracle

Author: Dann Corbit

Date: 12:23:07 12/22/05

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On December 22, 2005 at 14:35:56, Drexel,Michael wrote:

>On December 22, 2005 at 13:26:55, Dann Corbit wrote:
>
>>On December 21, 2005 at 21:20:10, Uri Blass wrote:
>>
>>>On December 21, 2005 at 20:30:18, Dann Corbit wrote:
>>>>
>>>>Generally speaking, chess engines have terrible judgement in early opening
>>>>positions and absurd judgement in gambits.
>>>>
>>>>For a bit of gambit fun, try this position on your chess engine:
>>>>
>>>>[D]r1bqk1nr/pppp1ppp/2n5/b7/2BpP3/2P2N2/P4PPP/RNBQ1RK1 b kq - am dxc3; bm Nge7;
>>>>
>>>>and see how long it takes to find Nge7.  Most engines I tried cannot find it in
>>>>an 8 hour search.  I have not tried it lately, but I guess that they still
>>>>cannot find it at 40/2, no matter what the hardware or program (w/o book, that
>>>>is).
>>>
>>>am dxc3 is easy for rybka
>>
>>Not for the others, though.
>>
>>>bm Nge7 is an harder problem and Rybka likes Nf6
>>>Are you sure that Nge7 is the only move?
>>
>>It is clearly the best move.
>
>I wonder how you came to that definite conclusion?
>You are aware of the alternative 7...Bb6 8.cxd4 d6 ?

It appears to have been popular in the 1800's.  In my database, I have 512 games
from that position:
[D]r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/5N2/P4PPP/RNBQ1RK1 w kq -
and white scores 58.8% of the points (well above average).

I am analyzing the position now.




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