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Subject: Re: Enpassant in Nalimov

Author: Norm Pollock

Date: 08:27:30 10/25/04

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On October 25, 2004 at 11:20:32, Eugene Nalimov wrote:

>On October 25, 2004 at 10:40:33, Norm Pollock wrote:
>
>>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.
>
>Your understanding is wrong.
>
>Thanks,
>Eugene

I'm glad to hear that.

There are 2 things about N-Tables I would like to know, especially because my
moderate speed machine relies very heavily on them when it plays on playchess.
One, is the afore-mentioned questioned about e.p. The other is how to determine
the best size for the tb cache.

Thanks,
Norm



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