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Subject: Re: An idea for ranking of chess programs

Author: John J. J. Smith

Date: 01:14:19 12/18/05

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On December 18, 2005 at 03:51:33, Uri Blass wrote:

>My idea is the following:
>
>decide that some weak program has rank 0.
>Choose hardware and time control.
>
>play the Noomen match between every 2 programs(this match has 100 games).
>
>Every program that score more than 60% against the weak program that you choose
>in the Noomen match is at least rank 1.
>
>If they cannot score more than 60% against programs with rank 1 they have
>exactly rank 1.
>
>You can see that I defined the programs with rank 1 and the programs with rank
>higher than 1.
>
>Suppose I defined the meaning of programs with rank n and programs with higher
>ranking than n.
>programs with rank n+1 are programs that scored more than 60% against at least 1
>program with rank n but did not score more than 60% against all the programs
>with rank that is higher than n.
>
>Not that this definition is meaningful only if the ratio is transitive and we
>need that to have that if A gets more than 60% against B and B gets more than
>60% against C then C cannot get more than 60% against A.

I think the potential problem is in the transitive assumption. If A beats B and
B beats C it doesn't always follow that A beats C. Look at how well Ruffian is
doing against Rybka.



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