Author: José Carlos
Date: 19:15:19 02/22/02
Go up one level in this thread
On February 22, 2002 at 18:35:35, Mike Hood wrote: >On February 22, 2002 at 15:22:00, José Carlos wrote: > >>On February 22, 2002 at 15:13:25, William H Rogers wrote: >> >>>Now I am currious. Is Crafty really rated that high or was its opponents not >>>rated low enough? This is not a slur to Dr Hyatts Crafty, we all know that it >>>plays great chess, but maybe instead of raising a players rating, they should >>>consider lowering an opponents rating as to not exceed the possible max(i.e. >>>3300). I think that would bring a much more resonable response to all players, >>>except of course, those whose ratings were forced to be lower. >>>Food for thought anyway. >>>Bill >> >> The answer is that ELO is only a _relative_ measure of results. ELO tells you >>"how player A performs compared to a given pool of players". There's no up or >>low limit, it's just a comparison. > ><<--snip-->> > >True, in theory ELO ratings are in a limited pool of players, but that's not how >ELO ratings are used in practice. They're presented as ratings comparing a pool >of all chess players on Earth. I don't think this causes problems, because >everybody plays somebody who plays against somebody else, so even if I only play >in my town's division four league, there are probably only five or six links >separating me from Gary Kasparov. There are only problems in the case of chess >players who are artificially separated from the pool, such as prisoners (Claude >Bloodgood) or hermits (Bobby Fischer). > >Since this pool is a pool of all the chess players in the world, maybe it would >be a sensible step to arbitrarily define the ELO of perfect chess and calibrate >the rest of the pool against this rating. Let's call perfect chess 3300, or >whatever. It doesn't really matter, as long as the ELO rating system doesn't >have an inflationary feature built into the algorithm and leads to higher >ratings for the world's best players from decade to decade. You're right on the fact that FIDE ELO has a pool of all chess players in the world, but you forgot to finish the sentence with the words "in a given moment of time". FIDE list of 01/01/2002 contains a pool of "all chess players on earth on 01/01/2002", but that list doesn't contain information about how to compare to the FIDE list of 01/01/2000, for example. That's the key point... And remember human players strength change every day... José C.
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