Author: David Eppstein
Date: 16:20:28 02/24/99
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On February 24, 1999 at 18:04:34, Vincent Diepeveen wrote: >On February 24, 1999 at 17:08:41, Dann Corbit wrote: >>Another interesting prize-winning category might be ELO per dollar. This would >>probably be very interesting to the end-consumer. > >Better is prizewinning category for elo per node. It makes no sense mathematically to divide Elo by anything, even ignoring the question of whether you can define a "node". The zero-point of the various Elo systems (USCF, FIDE, SSDF, etc) is completely arbitrary -- you would get essentially the same system if you subtracted say 1500 from everyone's number, which would change your proposed ratios dramatically. The only thing it makes sense to do with Elo scores is to look at the difference between two of them, which should be (some function of) the expected outcome of games between the two players. So, I have to say, elo per anything is a really stupid basis for awarding any kind of prize. Especially, since most of the programs in these competitions are going to have an Elo within 100 or so of each other, what you are really awarding is "minimum price" or "minimum number of nodes". We already know how to do that without playing any tournament games.
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