I had heard somewhere that there are some who believe 8.0 is the right komi for 9x9 Chinese. I personally believed for a long time it was 7.0 based on statistical data of games. However that can be misleading.
I noticed with CGOS data that White has a very slight edge with 7.5 but I also noticed by mini-maxing the tree for just the first 2 moves that black actually has a slight advantage if white plays the correct response to whatever blacks first move is. As it turns out the "correct" response is not quite as frequently played. Of course this mean little - it's just statistical data. However, I would prefer using the komi that tends to give the closest scores and I don't know if that is 6.5 or 7.5. So again, if 7.0 is correct, then (to me) the question is which komi gives the most even results. 6x6 is an interesting test case. It appears from Leela data that with 2.5 komi, black should win - but in practice black is much harder to play correctly. Maybe it's that way in 9x9? I would not be surprised if something like that was true of 9x9. So it is possible that with 7.5 komi black DOES have an advantage - but it's just more difficult to play. I'm just hypothesizing here. I guess I like 7x7 because statistically it's very very close and I suspect that if we changed to 6.5 there would be a significant bias in favor of black - but I don't know that for sure. - Don On Fri, 2008-10-03 at 05:12 -0700, David Fotland wrote: > It seems likely now that the correct komi for 9x9 is 7.0. If so, I'd prefer > 6.5 komi to 7.5, since 6.5 would have black winning most games, and most > other games have a first player advantage. This would give 9x9 go a similar > first player advantage. > > David > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of "Ingo Althöfer" > Sent: Thursday, October 02, 2008 10:35 AM > To: [email protected] > Subject: [computer-go] 7.5-komi for 9x9 in Beijing > > Gian-Carlo Pascutto wrote: > > I'd have some preference for playing the decisive game > > with komi = 6.5, but apparently thats not possible on KGS. > > But that should not be a problem, as long as the operators > do not believe in the final verdict of KGS. > > > I think with komi = 7.5 white > > is scoring very high (too high?) in the top games. > > I made a count for the 9x9-competition in Beijing (komi=7.5: > > Looking only at games among the top 5 rankers > there are 20 games so far (including two tiebreak-games) > with 15 wins for White and 5 Wins for Black. > > Looking at all games among the top 7 rankers > there are 40 games (including two tiebrak-games) > with 27 : 13 for White. > > Taking all 164 games of the tournament (including two > tiebrak games) White is ahead by 93:71. > > It is probably not an accident that the quota decrease > with decreasing playing strength: > > 15/20 > 27/40 > 93/164 or translated to decimals > 0.75 > 0.675 > 0.567. > > However, when B+7 is the correct value on 9x9, > komi=6.5 might lead into similar problems. > > Ingo. >
signature.asc
Description: This is a digitally signed message part
_______________________________________________ computer-go mailing list [email protected] http://www.computer-go.org/mailman/listinfo/computer-go/
