Author: Dann Corbit
Date: 19:05:34 03/05/04
Go up one level in this thread
On March 05, 2004 at 21:54:11, GuyHaworth wrote: > >A common confusion is to try to compare FIDE ELO ratings (about a community of >human players) with SSDF ELO ratings (about a community of computers). > >This is understandable, as the metric used is referred to as 'ELO' in both >cases. However, 'ELO' is the measurement system rather than the measurement, >the 'scale' rather than the 'weight'. > > >Following on from the above, I therefore propose a new nomenclature to >distinguish the measurement system from the specific measurements, as follows: > > ELO == the measurement system, as devised by Elo > FIDE_ELO == the ELO ratings derived by FIDE for the top human players > SSDF_ELO == the ELO ratings arrived at for the 'SSDF community' by SSDF > > >Aficionados of the ELO system will know that it is only the _difference_ in ELO >between two players that aims to represent the difference in their strengths. >Therefore, an arbitrary number can be added to all c_ELO ratings for community >'c'. > > >A separate exercise might be considered to see what is the best constant to add >to the c2_ELO ratings to bring them 'into line' with the c1_ELO ratings of >community c1, based on c1-c2 games cross-community. > >Unfortunately, there is evidence that: > >- the constant right for the top end of the c2 community would be wrong for the >bottom end: this is perhaps to do with the 'inflation effect' of the ELO >scheme. > >- the probability distribution for the 'correcting constant' is not that peaky, >i.e., c2 is not fixed with great certainty by only a few games. > >However, this does not detract from the proposal to quality 'ELO' as SSDF_ELO, >FIDE_ELO etc. > >I feel that less confusion would certainly be the result. The people who do not understand that an Elo figure for FIDE or BCF or USCF or SSDF are different are not going to understand that Elo Fide is different from Elo USCF and different than Elo SSDF. The way to clear away the confusion is to understand what an Elo calculation is, what it measures, and what it means. Putting another label on it will just label the confusion. IMO-YMMV.
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.