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Subject: Re: You compare apples with bananas

Author: blass uri

Date: 15:10:20 07/24/00

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On July 24, 2000 at 17:08:09, Robert Hyatt wrote:

>On July 24, 2000 at 16:41:56, Chris Carson wrote:
>
>>On July 24, 2000 at 16:09:20, Harald Faber wrote:
>>
>>>DB 97 does only have 6 games and the ELO so far has nothing to do with SSDF-ELO.
>>>When will all of you guys start to keep that in mind?
>>>What about burning this equation in the miror:
>>>
>>>
>>>SSDF-ELO <> FIDE-ELO
>>>
>>>
>>>It is quite disappointing for me to see that still several people assume
>>>SSDF-ELO = FIDE-ELO.
>>
>>I do not recall this statement in my post.  I did believe the relationship
>>some time ago, but changed my opinon as more data was revealed.
>>
>>I think the SSDF is looking into adjustments to make the two
>>rating systems more comparable, however, I am not sure it is
>>really a priority for them.
>>
>>Best Regards,
>>Chris Carson
>
>
>An  adjustment is absolutely impossible.  The only way to "adjust" the SSDF list
>is to take all the programs and play them in many human events, which would
>give each program a valid FIDE rating.  But trying to take some programs and
>compute a FIDE rating, and then using SSDF numbers to try to figure out how
>far _all_ programs should be adjusted is simply bad statistics...
>
>May as well have a 100*random() tossed into _that_ formula...
>
>ratings between computers and computers, and between computers and humans don't
>seem to have a lot in common...

They are not the same but they have a lot of common.
There is a positive correlation between results against humans and results
against computers.

I am sure that if you take the first 10 programs in the ssdf and the last 10
programs in the ssdf and give both to play against humans you are going to find
that the first 10 programs will be clearly better.

There may be a difference but I believe that in almost all the cases if one
program is clearly better against computers(difference of more than 100 elo) it
is also better against humans.

Uri



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