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Subject: Re: second test position resp-movei

Author: Gerd Isenberg

Date: 14:51:11 04/21/04

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On April 21, 2004 at 16:54:20, Uri Blass wrote:

>On April 21, 2004 at 16:44:15, Gerd Isenberg wrote:
>
>>On April 21, 2004 at 16:11:27, Uri Blass wrote:
>>
>>>Here is another case when I believe that movei blundered by playing Ba7 when
>>>after c5 the black bishop is a joke.
>>>
>>>I am surprised to see that not only movei has no sense of humor but even the
>>>ssdf leader  Shredder7.04(A1000, 64 mbytes hash) seems not to have it and cannot
>>>find the only logical move(Bd4) even after a long time(the second possibility is
>>>that I understand nothing about the position and the fact that the black bishop
>>>is out of the game is not important).
>>>
>>>Resp 0.19 - Movei 0.08.178d
>>>[D]1k1r3r/2p1n3/p1pq1p2/1pb1p3/1PP1P1pp/P2P3P/2Q1NPP1/R1BR2K1 b - b3 0 1
>>>
>>
>>Same for IsiChess MMX, likes Ba7 too all the time.
>>I thought i recently had implemented some trapped bishob code ;-)
>>Or was it already the AMD64 XMM-version which takes some more time?
>>
>>I guess there is probably wrong king safety compensation for the trapped bishop.
>>May be the closing "c5" makes the black king safer, due to less levers but more
>>rams on king related files. Other black pieces and the advanced pawns may be
>>ready for a king side attack. Interesting position!
>>
>>Gerd
>
>I believe that you need pieces to attack the king so the fact that the black
>bishop is trapped should also reduce the kins safety score against white.
>
>Uri

Yes, that's correct. But it's not so easy to find the a7-bishop completely
trapped. One should consider that the lever push a6a5 don't works, due to the a3
pawn, dispite opening the a file looks not good for black ;-)

Gerd



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