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Subject: Re: illegal positions in nalimov tablebases

Author: Uri Blass

Date: 01:15:26 02/04/05

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On February 04, 2005 at 04:05:52, Tony Werten wrote:

>You'll find lots more with white bishop on A8 and black pawn on B7, sntm in
>check etc.
>
>What's your point ?
>
>Tony

You are right that I will find better examples.

These examples are better because they are illegal also in FRC or alternatively
illegal with 3 pieces

B2K4/1p6/8/8/3k4/8/8/8 w - - 0 1

B2K4/1k6/8/8/8/8/8/8 b - - 0 1

The point is that it may be possible to reduce the size of the nalimov
tablebases by having only legal positions(unfortunately I guess that only a
small reduction is possible).

Uri

Uri



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