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Subject: Re: A really nasty position

Author: Peter Fendrich

Date: 13:31:26 05/29/01

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On May 29, 2001 at 16:23:59, Djordje Vidanovic wrote:

>On May 29, 2001 at 14:42:43, Miguel A. Ballicora wrote:
>
>>On May 29, 2001 at 14:21:13, Peter Fendrich wrote:
>>
>>>This position appeared in an ICC game: Guitje - TerraPi
>>>
>>>[D]2r3kb/5q1p/4pPp1/1p1pP3/p2P2Q1/PrP5/1P3R1R/2B3K1 w - - 0 42
>>>
>>>the last move from Terra was 41... b5
>>>Some moves earlier when white made g6, Terra decided to move the bishop from g7
>>>to h8.
>>>Both Rb3 and Bh8 are locked in and Terra is absolutely unaware of the
>>>hopeless situation. Yes, Terra lost...
>>>
>>>I see two different but connected problems for computer programs here:
>>>  - the closed position itself
>>>  - the two blocked pieces.
>>>
>>>How do you solve/avoid positions like this? Terra has about equal eval for this
>>>position.
>>>It is of course possible to punish pawn chains like this in order to avoid
>>>closed positions but is that really a solution and how to deal with blocked
>>>positions?
>>>
>>>//Peter
>>
>>Mobility helps a little in this respect. My program Gaviota has an small
>>evaluation where the mobility component is a big % of it. I gives in this
>>position +1.75 for white.
>>
>>Regards,
>>Miguel
>
>Does Black have enough time for the pawn b5 to b4 push?  That could change the
>situation somewhat...
>
>***  Djordje

Not really. White to move have either Rh6 followed by Rfh2 and Rxh7 followed by
Rh2+, both are easy win I think.
//Peter



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