I agree that the komi should not be changed unless there is a very compelling reason. My engine would have to be entirely recreated to support a different komi and I only want to maintain one engine for each boardsize. - George
On Wed, Oct 8, 2008 at 3:46 PM, Don Dailey <[EMAIL PROTECTED]> wrote: > On Wed, 2008-10-08 at 11:47 -0700, Christoph Birk wrote: >> On Wed, 8 Oct 2008, Don Dailey wrote: >> > much more common. There were just a few games that used 6.5 komi >> > because when I first started CGOS I had set 6.5 by mistake but I think >> > that was just for a few hours at most. The vast majority of these are >> > 7.5 komi games: >> >> After all this discussion about komi for 9x9 games, wouldn't you >> think that using 7.5 was a mistake and go back to 6.5 ? > > Why? > > First of all, it is not known that the correct komi is odd, we only > have the observation that without seki it would be odd and seki is > relatively rare. That is far from a proof - it's a hunch based on a > weak premise, we assume that the rarity of seki is statistical evidence > that komi is odd. And even if we accepted it as such then we admit the > possibility that it is really even. > > But let's say the correct komi is 7. I think that is fairly likely. I > also believe that if komi is even, it's not going to be 6, it's going > to be 8. I base this on weak statistical evidence from CGOS games that > I mini-maxed. Also, would you think 5.5 or 7.5 is better? 5.5 gives > black a huge advantage. I think komi is 7 or 8. > > But let's say it's 7. I don't see any reason to favor 6.5 over 7.5 > unless as Dave Fotland says we want to favor the first player as is done > in many other games. The only reason I would favor one over the other > is if it turned out that in "practical play" the games ended up closer. > For instance if black won a 53% at 6.5 komi and white wins 51% at 7.5 > komi, I would favor 7.5 because it kept the scores close. I believe > 6.5 would give black a bigger advantage than 7.5 gives white in > "practical play." > > It would be great if we could prove that 7 is correct but I don't think > we have a reasonable way to do this. > > Is there any way to prove that with best play the game cannot end in > seki? I would accept that as a strong indication that 7 is probably > correct, because I doubt anyone believes 5 or 9 is correct. I think the > candidates are 6, 7 and 8. > > - Don > > > > > > > >> >> Christoph >> _______________________________________________ >> computer-go mailing list >> computer-go@computer-go.org >> http://www.computer-go.org/mailman/listinfo/computer-go/ > > _______________________________________________ > computer-go mailing list > computer-go@computer-go.org > http://www.computer-go.org/mailman/listinfo/computer-go/ > _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
