Author: Alberto Rezza
Date: 02:19:11 06/16/01
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On June 16, 2001 at 00:53:39, Bruce Moreland wrote: >That's different. It's kind of like a cline. Actually, I don't know exactly >what a cline is, but the idea is that if you have some birds that live in Maine, >and some other birds that live in Florida, and you have the same kind of bird >all up and down the coast, the birds in any given area may be able to breed with >the birds in any adjacent area, but the birds in Florida might be enough >different from the birds in Maine that they can't breed. You end up having one >species up north, and another down south, but the line between the species is >very blurry. > >You might be able to compare time periods by examining results attained by >people that played over long periods of time, but people change and styles >change and what it takes to play the game at the professional level changes. Yes, it's like the old hand-shaking game. Instead of trying to reach Bush or Abe Lincoln, we'll aim to Kasparov or Capablanca. Even a very weak player has probably shaken hands (= played a game) with somebody who has played with some GM. Two more games (four games in all) and we reach Kasparov. We should be able to reach Capablanca in six games or so. Even if its composition changes with time, it's still a single pool of players. Just treat it as a single pool and compute all ratings... Obviously any comparison between the Elo ratings of, for instance, Capablanca and Kasparov, obtained in this way, won't be very reliable. But the same is true when comparing games from the same time: Kasparov and Mr. Nobody (1700 Elo), who only ever played in his hometown, do *not* play in the same pool of players.. :) Alberto
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