Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Green List formula sucks

Author: Vincent Diepeveen

Date: 06:55:12 01/18/00

Go up one level in this thread


On January 18, 2000 at 09:12:16, Andrew Williams wrote:

>On January 18, 2000 at 08:49:48, Vincent Diepeveen wrote:
>
>>"R(mhz)    rating/log(mhz)/100.  Shows the performance of an account,
>>          taking into consideration the cpu speed."
>>
>>First of all Will is taking into account for his formula a logaritme,
>>combines that with rating and computer Mhz.
>>
>>This assumes a logarithmic connection between Mhz of a machine and its
>>rating.
>>
>>Obviously this is wrong.
>>
>>Let's take crafty:
>>
>>Wild        2148  [6]   195    50     8   253   2148 (06-Aug-1999)
>>Bullet      3033       6241  1412  1018  8671   3191 (27-Oct-1999)
>>Blitz       2858      48312 12919  8716 69947   3268 (27-Oct-1999)
>>Standard    2550       3761  1496  1117  6374   2785 (08-Aug-1999)
>>
>>Machine = 4x400 = 1600Mhz
>>rating  = 2550
>>
>>So this would make
>>   R(mhz) = 25.50 / log(1600) = 7.95
>>
>>Now that sounds a bit low to me personal already.
>>
>>Let's now assume that Bob wants to top the green list:
>>
>>  He needs 11.0 then as R(Mhz) to top it more or less.
>>
>>So 11.0 = rating / 100*log(1600)
>>   rating = 11 * 100 * log(1600) = 3525
>>
>>So crafty needs an incredible rating of 3525 to top the greenlist.
>>Good luck Bob!
>>
>>Why invent a formula if it's in advance already dead wrong?
>>
>>Rating is not based upon the 10th log of something.
>>It SURE does not represent performance taking into account
>>the machine speed.
>>
>>
>>Vincent
>
>I'm not sure what you mean by "top the Green List". The list is
>ordered by ICC rating, so if crafty were a "green" program, it would be
>top already. I think the R(MHz) figure isn't to be taken as anything
>more than giving a general feel for the influence of clock speed.

But it is NOT representing influence of clock speed. In contradiction,
it is FAVOURING slow machines.

Why put R(Mhz) there, as if it's a scientific smart thing, where it
sucks bigtime!



>I think the Green List is great, as was its precursor the "Under 2600
>List".

Crafty is under 2600. Why put R(Mhz) there anyway then?

>Andrew



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.