On Mon, Jan 7, 2013 at 11:19 AM, David Ongaro <david.ong...@hamburg.de>wrote:
> Am 07.01.2013 um 17:01 schrieb Michael Alford: > > > On 1/7/13 12:08 AM, "Ingo Althöfer" wrote: > > > >> Go is traditionally played on boards of odd sizes (9x9, 13x13, 19x19, > ...) > >> and almost never on even ones (10x10 or 18x18 ...). What are the reasons > >> for this? > >> > >> Ingo (has observed something and wants to put it in context). > > > > Interesting discussion and links. I remember reading, although I cannot > name the source, that board size was set at 19 due to extensions from the > corner to the point under the side hoshi, only one player can extend to any > side point, the other player is left with a less than optimal extension, if > the board is larger, both players can make a proper extension, so 19 is the > size which preserves the competition for that extension. > > Why we settled on 19x19 is another question compared to why we use uneven > board sizes. > > Anyway, people a really good in making up convincing reasons for some > arbitrarily decisions. But this proves nothing (just look into split-brain > research). I found the research of > http://www.youtube.com/embed/JMDjpSQUH74. According to him 19x19 is just > much nearer to the number of days in a year than 17x17. Therefore a board > of this size is more useful as a calendar. > I think many ancient people used a 360 day calendar - so 361 would be a big improvement! Don > > Regards > > David > > _______________________________________________ > Computer-go mailing list > Computer-go@dvandva.org > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >
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