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Subject: Re: Enpassant in Nalimov

Author: Norm Pollock

Date: 07:40:33 10/25/04

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On October 25, 2004 at 09:41:07, GuyHaworth wrote:

>On October 25, 2004 at 09:02:14, Henry Hongdoyo wrote:
>
>>Hello Joost,
>>
>>This is really my last question.
>>Fen string : 7k/8/8/6Pp/8/8/8/K7 w - h6 0 1
>>Nalimov give me wrong Distance To Mate because not
>>consider Enpassant in h6. (should be 0)
>>where can i add this condition ?
>>i try to check enp variable; but it didn't work.
>>
>>what should i do to handle enpassant status in h6
>
>
>I thought Eugene's EGTs included positions with e.p. options.
>
>The problem may be in the interface to EN's EGTs.
>
>For example, http://chess.jaet.org/endings/ does not seem to pick up the e.p.
>information from the FEN string.
>
>g

It is my understanding that e.p. is not covered in Nalimov tables, and is
therefore a bug. The resulting problem is due to the fact that 5-man tables
start being accessed with 12-14 pieces on the board (with my moderate speed
machine, more pieces on the board with fast machines). The likelihood of ep with
only 5 pieces is practically nil, but ep does occur with 12-14 pieces on the
board.



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