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Subject: Re: Did someone try fixed depth tournaments?

Author: Robert Hyatt

Date: 17:54:46 04/13/01

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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.

And pointless.  IE have an automobile race where your tach can't exceed
7,000 RPM.  If my engine makes all its horsepower at 9,000 RPM, I will
get killed.



>
>I think that it will be intresting to have a rating list of the following
>programs:
>
>Deep Fritz(1 ply)
>Deep Fritz(2 plies)
>Deep Fritz(3 plies)
>...
>Deep Fritz(10 plies)
>Deep Fritz(11 plies)
>Deep Fritz(12 plies)
>Hiarcs7.32(1 ply)
>Hiarcs7.32(2 plies)
>Hiarcs7.32(3 plies)
>...
>Hiarcs7.32(10 plies)
>Gambittiger(x plies)
>Tiger14(x plies)
>
>You can add more programs like Nimzo8 or the latest chessbase version of Crafty.
>The rating of the programs should be based only on games between different
>programs so there should not be games between Deep Fritz(6 plies) and Deep
>Fritz(7 plies) because I remember that when Fritz6 played against itself people
>criticized the experiment and said that it does not prove diminishing returns
>from bigger depth.
>
>Uri



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