Author: Eelco de Groot
Date: 08:13:41 12/01/99
Go up one level in this thread
Hello, couldn't resist, it's me again Tina, Your tables were much neater than my particle-lists were, Tina! I should have used Tab-stops, I suppose. What you said about Hiarcs and Tiger made me wonder last night. If the results would have been not 16-26 but say 8-13, would the ratings then have been different even though scoring percentages are the same? I'm now thinking they could be if at first I thought not. Maybe somebody from the SSDF could correct me. My thinking was that if all of the results against different computers were in perfect agreement it wouldn't matter how many games were actually played. Only the error margins would be different and there would be no skewness of the curves. But as Jan Hein Donner, a Dutch Grandmaster, once said: "Chess is just a game of chance". So there will be differences and especially with computers it is often like they are playing a Paper, Rock and Scissors game. A beats B, B beats C and C tears A to shreds again. Then if the results had been 8-13 against Tigger, Hiarcs rating would go down as compared with better rating-results against other computers and you would get a skewness in error margins too. Tigers rating goes up but I am assuming here that the average of ratings for the older platforms doesn't change, that that acts as a reference? Not really sure what method they use. So, skewed error margins would be an indication that not all the results were in perfect agreement, things could well change if more games were played because it could have been a chance effect. Else it could have been that Tiger is sort of an "Angstgegner" for Hiarcs. Then, after a 8-13 result for instance the SSDF could have decided to play some more games, to see if Hiarcs could pull back. And if it didn't its rating would go down again even if the percentage against Tiger didn't change. Bottomline: I hate to admit it but think you are right again, Tina! Yes, I will finally shut up now, things keep piling up and I have to get at least some of them done. But eh, about Playing, your Games are Important! Please Have Fun... Just had to tell you that.. Best regards, Eelco
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.