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Subject: Re: Fritz 6 repetition bug?!

Author: Torstein Hall

Date: 13:27:35 09/09/01

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On September 09, 2001 at 15:18:30, Dave Gomboc wrote:

>On September 09, 2001 at 12:26:35, Torstein Hall wrote:
>
>>When Fritz has the gamescore it wants to play 33.Rd6 whish probably wins, but
>>takes a lot longer. If the game score is not given to Fritz it want to play
>>33.Qe6+ like Kasparov did. This must be a repetition bug?! Crafty has no
>>problem to see that Qe6+ is the fastest win even with the gamescore.
>
>Perhaps there was hash information from analysis that went off after the game
>was entered that caused a cutoff, leading it to search differently?
>
>Dave

If you load the game into Fritz and follow the gamescore to the position, it can
not see it. If you go straight to the position without Fritz having the
gamescore it finds Qe6+ at once. I do not know if Fritz looks at the hash to see
draws but that is pretty probable. Anyway I think its easy to spot the reason
for this "bug". Fritz and a lot of other programs gives the second repetition
the score 0.00 even if the side with the advantage can vary next move with a big
advantage.

Torstein





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