Bill Gletsos

01-01-2004, 05:47 PM

Starter,

I have done a comparison between the Dec 2003 ACF ratings and the Jan 2004 FIDE ratings.

Back when we did the comparison between the ACf Dec 1999 ratings and the Jan 2000 FIDe ratings we ignored anyone who had an ACF rating below 1900. This resulted in an average difference of 150 points. Hence the 150 point uplift added to players ratings prior to the calculation of the ACF April 2000 ratings.

This time we have ignored anyone with a ACF rating below 2050. This time the difference is 68 points.

Now someone is surely going to argue that players lost most of the the 150 points that were added to virtually all players Dec 1999 ratings. If they did this they would be incorrect.

There are currently 212 FIDE rated players who have played games in the ACF System since the Dec 1999 rating period. The average ACF rating of these 212 players back in Dec 1999 after the 150 points was added was 1976.038.

The average rating for this same group of 212 players in December 2003 is 1975.775. A difference of only 0.283.

Therefore this would indicate that there is no loss of 150 points but simply a redistribution of the points amongst the players, a situation that is to be expected unless someone is silly enough to argue that all 212 players are static and have neither improved or declined during this 4 year period.

Since there is no loss of rating points within the ACF pool, it therefore seems that the FIDE pool has inflated by 68 points during this same 4 year period.

I have done a comparison between the Dec 2003 ACF ratings and the Jan 2004 FIDE ratings.

Back when we did the comparison between the ACf Dec 1999 ratings and the Jan 2000 FIDe ratings we ignored anyone who had an ACF rating below 1900. This resulted in an average difference of 150 points. Hence the 150 point uplift added to players ratings prior to the calculation of the ACF April 2000 ratings.

This time we have ignored anyone with a ACF rating below 2050. This time the difference is 68 points.

Now someone is surely going to argue that players lost most of the the 150 points that were added to virtually all players Dec 1999 ratings. If they did this they would be incorrect.

There are currently 212 FIDE rated players who have played games in the ACF System since the Dec 1999 rating period. The average ACF rating of these 212 players back in Dec 1999 after the 150 points was added was 1976.038.

The average rating for this same group of 212 players in December 2003 is 1975.775. A difference of only 0.283.

Therefore this would indicate that there is no loss of 150 points but simply a redistribution of the points amongst the players, a situation that is to be expected unless someone is silly enough to argue that all 212 players are static and have neither improved or declined during this 4 year period.

Since there is no loss of rating points within the ACF pool, it therefore seems that the FIDE pool has inflated by 68 points during this same 4 year period.