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Subject: Re: Reproducible result for position test with Rybka?

Author: Uri Blass

Date: 12:00:26 12/14/05

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On December 14, 2005 at 10:08:25, Ernest Bonnem wrote:

>On December 14, 2005 at 09:57:11, Uri Blass wrote:
>
>>On December 14, 2005 at 09:40:40, Ernest Bonnem wrote:
>>
>>>With other programs, in order to run twice in a row a given position and have
>>>reproductible results, you only need to prohibit position learning and clear the
>>>hash (either on the GUI, or Engine Options).
>>>
>>>But with Rybka, the only way I found to run twice in a row a given position and
>>>have reproductible results, is to quit the program and launch it again.
>>>This is true both with Rybka Beta and Rybka Preview (Rybka Preview has added a
>>>"Clear Hash" button in the Engine Options, but using this button is not enough).
>>>
>>>Small bug, Vas?
>>
>>Rybka is not the only program with the same problem and I believe that many
>>programs have the same behaviour.
>>
>>Did you try Fruit or Movei?
>>
>>Uri
>
>Fruit behaves perfectly, in this respect. Fabien actually told me that Fruit
>reacts to the "ucinewgame" UCI command. Pasting the FEN string also
>reinitializes the tables...

I know that clear hash tables does not work under Fritz gui and I remember that
fabien admitted that it does not work under Fritz.

I did not think to try different gui
Note that I prefer Fritz gui relative to shredder gui because fritz gui give me
more options(for example there is next best under fritz gui and I do not see it
under shredder gui)

In second thought
maybe there is an option of next best under shredder gui because shredder
responds correctly to next best but I did not see it.

Another advantage of fritz gui is that
if I analyze in 3 option mode under fritz gui and replace engines it continue to
analyze in 3 option mode.

In Shredder gui it goes to the default one option mode.

Uri



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