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Subject: Re: Knight vs Bishop with pawns ending

Author: Robert Hyatt

Date: 05:56:26 01/08/99

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On January 08, 1999 at 04:22:09, Howard Exner wrote:

>b5k1/7p/4p1pP/4P1P1/8/8/8/N5K1 w
>
>Here is a position based on a game between Cm6000 and Fritz 5.32.
>( the recent game with the move d3 thread).
>I created this position to see if Chess programs have
>an accurate assessment of the relative values that the Bishop and
>Knight have. Material is equal yet all endgame authors I've read usually
>comment on positions like this in the following manner - "White has
>a huge advantage as all the pawns are on the same side of the board.
>Furthermore whites pawns cannot be attacked and once the powerfull
>white Knight reaches f6 the game will be over."
>
>
>How will programs eventually come to deal with assessing this position
>correctly? Will this be a kind of position that programs will never
>quite understand? Do any programs penalize the bishop here or
>conversely, give the Knight extra value in this position?

I do.  And I've been doing this for some time...  my code simply says that if
pawns are on _both_ wings, the bishop is given a significant bonus over the
knight.  If the pawns are on one side of the board, then this is not done.  It
has worked pretty well, although I wouldn't say the 'value' is tuned perfectly
just yet...  and it isn't always correct to do this.  But it is right most of
the time...



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