Of course it affects mirror go. But I wouldn't call the lack of a tengen a "technical reason" that even-size boards are not popular. It's a subjective reason. People like the way the board looks when there is a tengen.
On Fri, Jul 15, 2011 at 1:36 PM, steve uurtamo <[email protected]> wrote: > there is a technical reason why even sized boards never show up except > for artificial situations -- there is no tengen. i believe (although i > haven't thought about it carefully) that this affects mirror go, so > makes it a technically different game (more so than just size). so for > instance, 20x20 boards shouldn't behave "almost" like 19x19 boards, > but 17x17 should (except for being much smaller). i'm not sure if > there's a reason to believe that prime sizes are better than composite > sizes, but could easily be convinced of this. > > s. > > On Fri, Jul 15, 2011 at 4:58 AM, Petr Baudis <[email protected]> wrote: > > On Thu, Jul 14, 2011 at 07:33:54PM -0400, Michael Williams wrote: > >> How does Pachi handle integer komi? > > > > Naively, but reasonably well. It reached several jigos in the integer > > komi 9x9 KGS tournaments. > > > > > > On Thu, Jul 14, 2011 at 09:25:11PM -0400, Michael Williams wrote: > >> I noticed some unusual beharior from Pachi on 6x6 with komi 4. I > understand > >> that this is not a format that you are targeting or have tested > extensively, > >> but I thought I would mention it in case it is symptomatic of something > that > >> may also come into play at other sizes. > > > > Thanks for reporting this. It is caused by the symmetry code, the > > symmetry is not breaked properly on even-sized boards (I almost never > > tested Pachi on these). Adjusting the symmetry code to handle even-sized > > boards is possible, but it would require a serious thought I cannot > > spare right now, so I applied a band-aid and disabled symmetry > > compensation for even-sized boards altogehter for the time being. > > Patches for a real solution are welcome. :-) > > > > > > On Fri, Jul 15, 2011 at 12:05:28AM -0400, Michael Williams wrote: > >> A feature request related to this: In uct_evaluate, don't process moves > >> that are symmetrically-equivalent to moves that have already been > processed. > > > > I have done that now, thanks for the suggestion. But as explained above, > > it will have no effect on even-sized boards. > > > > -- > > Petr "Pasky" Baudis > > UNIX is user friendly, it's just picky about who its friends are. > > _______________________________________________ > > Computer-go mailing list > > [email protected] > > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go > > > _______________________________________________ > Computer-go mailing list > [email protected] > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >
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