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Subject: EPD position - value of pawn vs positional factors

Author: Will Singleton

Date: 12:09:21 10/28/98


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



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