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Subject: Re: Detecting backward pawns

Author: KarinsDad

Date: 11:42:44 06/17/99

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On June 17, 1999 at 13:32:19, Dave Gomboc wrote:

>Imagine:
>
>White Ra1, Pa4, Pb4, Pc3
>Black Ra8, Pa6, Pb5, Pc6
>
>The a6 pawn should be evaluated as either isolated or backward (depending on who
>is to move), assuming other pieces do not interact with this configuration.
>
>Dave

r..
...
p.p
.p.
PP.
..P
...
R..

The a6 pawn cannot be considered isolated unless black plays ba (which is not
forced).

The reason that it appears that the a6 pawn is backwards is due to the white
rook having control of the a5 square indirectly (since white can play ab at any
time). If black had another rook protecting his a8 rook, then the a6 pawn would
not be considered backwards due to the a6 pawn not being pinned (i.e. the a6
pawn could be pushed without the penalty of losing a pawn).

I think that examples like this are excellent since they illustrate that some
concepts are MUCH more complex than is readily apparent (and hence the need for
a search engine).

KarinsDad :)



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