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Subject: Re: Neverending story with incomplete tablebases

Author: Amir Ban

Date: 10:57:00 08/10/03

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On August 09, 2003 at 19:11:16, Harald Faber wrote:

>On August 09, 2003 at 05:55:43, Tony Hedlund wrote:
>
>>How can J8 allow game 14 to end as a draw?
>
>
>This is no serious question, isn't it?
>It has been posted and mentioned approx. 1,000,000 times. It is the problem of
>incomplete tablebases. AFAIK you/SSDF uses the "Fritz Endgame Turbo". Based on
>the Chessbase marketing it consists of 4 CD-roms with "the most important
>endgame tablebases". Based on what you saw in this game, what many many others -
>include me - have seen in similar positions, it is crap.
>Let me ask you a question. If your answer is yes, do I win a price?
>Here is the US-$1,000,000 question:
>Are you missing at least one of these files in your tablebase-directory?
>
>kqbkp.nbb.emd
>kqbkp.nbw.emd
>kqbkn.nbb.emd
>kqbkn.nbw.emd
>kqbkb.nbb.emd
>kqbkb.nbw.emd
>kqbkr.nbb.emd
>kqbkr.nbw.emd
>kqbkq.nbb.emd
>kqbkq.nbw.emd
>
>
>If you had them all(!), Junior 8 would have mated.
>
>Don't you think it is time to consider
>a) adding the missing 5-man files or
>b) kick the existing 5-man?
>
>

I don't understand this explanation. Are you able to recreate this by omitting
some 5-man files ?

The log doesn't show what J8 was thinking. Apparently it thought it was mating ,
because it played all moves in 0 seconds.

I remember a long time ago that engines had 50-move rule problems due to TB
handling, but not problems of walking into repetition.

Amir



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