Thank you all for your comments!.. :) It helped me to get some very good insights!.. hehe :) I am not closing the thread, in case someone has more opinions, etc...
> When you said a "23% difference" did you mean the win-ratio is 61.5:38.5? Well, basically I mean that in 1000 games, system A1 can win about 300 games (30%) against B, while A2 can win about 530 games (53%) against B. So I calculate a difference of 23% between A1 and A2. As Ingo noted, this assumes transitivity, that may not always happen in real life, but as Don said, it can be a "good" approximation.... In a more strict interpretation, A2 would be 23% better "when playing against B"... Thanks, Leandro On Mon, Nov 26, 2012 at 4:18 PM, Mark Boon <tesujisoftw...@gmail.com> wrote: > On Mon, Nov 26, 2012 at 1:09 PM, Kahn Jonas <jonas.k...@math.u-psud.fr> > wrote: > > > > That's not too far from the winrates between Cho Hunhyun and Seo > > Bongsoo. > > The latter is far from the glory of the former, but when they were by > > far the two strongest players in Korea, Seo has won his share of titles. > > > > To be honest, I don't have solid statistics to back it up. Having said > that, I'd be surprised if the real winning percentage of Cho Hunhyun > vs. Seo Bongsoo would be 62:38. How often did they play? > > I remember in the old days the Go World magazine would publish the > winning rates of the top players in Japan. If I remember correctly, > the handful of players dividing the bulk of the titles over a decade > would still only have a winning rate of about 55% over the whole year. > Of course this is partly caused by top players playing among top > players. But they also still play a lot against lower-tier players in > for example the qualifying rounds of tournaments. > > The other thing you have to take into account is this: if a 'weaker' > player played lots of 5-game matches against a top player, he might > occasionally win one set. But the qualifying systems of these > tournaments are so extensive that the weaker player very rarely makes > it through. So the weaker player doesn't get a lot of shots to try. > Occasionally it happens that someone wins a title as a one-time off. > Most titles are divided among a small number of top players while the > majority of 9p players never win any. But I'm hazarding the guess that > if you'd pit a top player against a 'weaker' 9p player who never won > anything major, the winning percentage of the top player would be less > than 62%. But it's still only a guess, I admit. If someone has > statistics at hand I'd be interested to see. > > Mark > _______________________________________________ > Computer-go mailing list > Computer-go@dvandva.org > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >
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