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Subject: Re: EPD position - value of pawn vs positional factors

Author: Peter Kappler

Date: 18:56:53 10/28/98

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On October 28, 1998 at 15:09:21, Will Singleton wrote:

>All,
>
>In a game last night on ICC, my program had the following position:
>
>r2q1rk1/pp1bppbp/5np1/2Pp4/5B2/2NBP3/PPP2PPP/R2Q1RK1 b - -
>
>White's last move was 10.dxc5.  The logical move is 10...Qa5, allowing for the
>recapture of the white pawn.  But it switched in ply 7 to 10...Rc8, permitting
>11.b4, leaving white a pawn up.
>
>I thought this was a bug until I ran gnuchess on it, and it also switched to
>10...Rc8 after awhile.  Hiarcs, on the other hand, shows +0.80 for white after
>that move.
>
>My thought is that some programs might consider white's position weakened enough
>to offset the loss of the pawn (looks like white might end up with 2 doubled
>pawns).  But I consider 10...Rc8 a bad move, since it gives up a pawn
>speculatively, with no real advantage to show for it.  I lost the game (against
>Hossa), unable to push any advantage.
>
>What do other programs think of 10...Rc8?
>
>Will


Will,

I think 10...Rc8 is a good move.  You mentioned that this allows 11.b4, holding
the pawn, but 11...b6 seems like a good response.  I don't see any way for White
to hold on to that pawn.  In fact, I think 11.b4 is a weak move which weakens
White's queenside pawn structure, and gives Black's g7 bishop more scope.

Oh, my program likes 10...Qc8.

--Peter






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