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Subject: Re: Tablebases for 5 pieces with 2 pawns(black,white) on the same file.

Author: Robert Hyatt

Date: 05:00:13 10/13/98

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On October 13, 1998 at 02:36:31, blass uri wrote:

>I think that if the pawns are blocked it may be easy to built the tablebases
>because the number of different position you need to evaluate for every case is
>less than 300,000.
>It is even more easy than KQvKR positions
>
>After you build the tablebases for blocked pawns you can build tablebases for
>all the cases of almost blocked pawns(like blacka6, white a4)
>and you can do a tablebases for all the cases when the pawns are in the same
>file.
>
>These positions are in many cases not a win for the strong side.
>There are cases when it is a draw If the weak side can take the pawn by the king
>or a fortress posdition against a bishop
>or even a win for the weak side if the knight cannot protect the pawn and stop
>the another pawn from being a queen.
>
>Uri



the only thing wrong with this is that these databases are very time-
consuming to build.  When you do a 5 piece file, you take the 5 pieces you
are interested in, and put them on *every* possible square they can reach.

And that produces some deep mates that make construction time-consuming...



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