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Subject: Re: KBBK question

Author: Robert Hyatt

Date: 14:46:59 01/02/06

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On January 02, 2006 at 14:47:04, Jan K. wrote:

>Hi, I have a question about KBBK endgame:let's say that you have only simple
>minimax searching 4-6 ply,no extensions,no selectivity,just the plain algorithm.
>How would you design your evaluation to be sure that the mate is found in
>reasonable time(<30 moves)? It seems that evaluating the most obvious
>factors(king distance,corner distance) is not enough here.

1.  losing king has to be driven to edge of the board.

2.  losing king then has to be driven to a corner.

3.  winning king also has to get close by to cut off the last escape from the
two bishops checking.

Same basic idea for KBN vs K which is also easy to evaluate, except now you have
to recognize the "right" and "wrong" corners and drive the losing king to the
right one.




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