Author: Odd Gunnar Malin
Date: 04:28:55 09/19/00
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On September 18, 2000 at 20:12:46, Dann Corbit wrote: >It makes no difference what number they add or drop from the list. >An ELO value prediction is purely based on differences. >(x + 1000) - (y + 1000) is identical to (x-y). >The adjustment has no impact whatsoever on the figures. If it makes some people >happy, it just means that they had no idea what the figures meant in the first >place. >In any case, I would be rather surprised if the new numbers fit human players >better unless the adjustment was based upon a large collection of real data. If >it had been based on a large collection of real data, that would have been a >pretty exciting experiment, and I think we would have heard about it. >Hence, my conclusion is that the change was made solely to hush the wild beasts >of the forest who feared the big and mighty numbers but will be calmed by the >melodious tones of n-100 music. That ok that this list could only be compared with its own pool but in advertising this rating is used on people that would like to bay the products. Either as a playing program, or as an analyses tool. You must know a bit on comp-comp play an some background on Elo’s rating system to understand that this list is not comparable to Fide’s or any national list. If this list should stand out as a separate list maybe they should add (as your suggestion?) 1000 point to each? Or make another centre for the deviation on about 1400 as our national list have. I third alternative are to compare some common players and adjust it after that. Maybe that is what they have done except that they must have made another adjustment between the comp-human list. (I believe some national lists do this as by comparing the active top player on the Norwegian or the Danish list with the Fide list they are pretty much the same.) When it comes to using the engines as analysis tool the 100 point decrement should (I think) have been 500. Clip from ChessBase site JUNIOR 6 Leader of the World Ranking List // In January 2000 it was the first program to cross the 2700 Elo barrier on the SSDF world ranking list. // Clip from Chess Assistant site Built-in Chess Tiger 12.0, one of the strongest playing programs in the world, rated 2696 on a K6-2/450 computer. Program No.1 in November SSDF list. Odd Gunnar Malin
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