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Subject: Re: Some questions

Author: Harald Faber

Date: 13:10:43 12/06/02

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On December 06, 2002 at 13:05:22, Tony Hedlund wrote:

>On December 06, 2002 at 00:53:51, Harald Faber wrote:
>
>>On December 05, 2002 at 03:58:01, Tony Hedlund wrote:
>>
>>>Take a look at game 21. Shredder had a winning endgame, both programs showed
>>>mate in 9. But suddenly the game ended in a repetition draw! A bug in Shredder?
>>>Tony
>>
>>- This behaviour has been noticed with several engines before.
>>- It has ALWAYS been caused by incomplete tablebases.
>>- In this case AFAIK it is caused by the incomplete "Fritz endgame turbo".
>>- That is the reason why I call this "Fritz endgame turbo" a piece of shit.
>>- The question arises: WHY does SSDF use the Fritz endgame turbo? IIRC SSDF only
>>tests chess programs kind of "out of the box". The Fritz endgame turbo is no
>>part of Shredder 6/7 nor any other CB chess program. Why do you use it?
>
>You provide the answer yourself in your last sentence.
>
>>- Why aren't the programs tested by using their provided package? So when there
>>are some 4- and 5-man tbs on the released CD, install them for that specific
>>program.
>
>It's done.


Haven't you written to test with the Fritz endgame turbo? This is NO part of any
ChessBase playing program.


>>- The problem with incomplete tbs is well known, also for you.
>
>I wasn't aware that Shredder had this bug. Yes, I agree with Bob that it *IS* a
>program bug.


This bug happens not only to Shredder. Several (all?) CB-engines show the same
behaviour and I am not sure whether the ChessPartner programs also behave like
that. Anyway this - bug - is known since ages and has been reported here and on
other computer chess boards frequently.




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