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Subject: Re: Did someone try fixed depth tournaments?

Author: Uri Blass

Date: 19:45:43 04/13/01

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On April 13, 2001 at 20:54:46, Robert Hyatt wrote:

>On April 13, 2001 at 00:40:47, Uri Blass wrote:
>
>>It is possible to play gmaes at fixed depth under Deep Fritz.
>>
>>Did someone try to play tournament between engines at fixed depth in order to
>>find out which engine earns more from getting more plies and if there is a
>>diminishing return from bigger depth?
>
>
>This is trivial to solve by induction.  If program A can search to depth=15
>in 3 minutes, and program B can search to depth=6 in 3 minutes, and the two
>programs are "equal" at 3 minutes per move, then the program that can only
>search to depth=6 is going to get more for each ply than the one that can
>get to 15.  Simple induction.

No
It is not clear.
Even if you assume that the programs are equal at all time controls

It is also possible that the 2 programs have the same branching factor when
program A needs time for the first iteration.

There was a claim that programs with smaller branching factor are better
programs and that Genius was bad at long time control because of bad branching
factor.

I think that the main problem of Genius at long time control was the fact that
it did not do extensions of more than 12 plies.

I do not say that I can learn from the experiment which program earns more from
time but I can learn more information if I have also the branching factor of the
programs at different depthes.

Uri



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