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Subject: Re: CEGT Blitz Update December 12....New Leader

Author: Uri Blass

Date: 16:09:32 12/12/05

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On December 12, 2005 at 18:29:26, Chessfun wrote:

>CEGT Blitz Rating List updated:
>
>BLITZ:
>http://www.husvankempen.de/nunn/
>
>8 New engines added:
>
>Rybka 1.0 Beta 64-bit
>Chess Tiger 2004 Normal

It seems that chess tiger 2004 normal played 120 games out of 520 games against
ktulu7.1

I think that when one engine play so many games against single opponent the
rating may be misleading because it is possible that one program has good result
against specific opponent.

I suggest that you reduce the number of all games between 2 opponents to 30
games for rating calculation and it means that tiger2004 got 14.75 out of 30
against ktulu7.1 and not 59 out of 120 against it because you should not let one
player to decide about the rating list because by this idea if you play 1000
games between Fritz9 and TogaII1.0 and Fritz9 scores less than 45% you can tell
fritz9 to go down in the list and togaII1.0 to fight for the first place.

Of course if there is data about more games I do not say not to use it but you
should use it only to get better estimate for the result in 30 games.


Tiger also played only against 6 opponents so I think that for calculation you
should assume that it played 180 games by reducing the number of games of it
against every opponent to 30 and 180<300.

Uri



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