There was a triple Ko recently on kgs during a youth match. I'm not qualified to say how naturally it arose, but it was under NZ rules, so kept play progressing (and was a major disadvantage to black, if I recall correctly).
I think that the edge cases are much more easily exploited by stronger players, so it seems reasonable that strong players should know how to recognize them. s. On Jun 6, 2012 6:47 PM, "Mark Boon" <[email protected]> wrote: > On Wed, Jun 6, 2012 at 1:47 PM, Darren Cook <[email protected]> wrote: > > > > Is four moves the longest super-ko cycle possible? I thought it could be > > longer, using some capture and refill approach. But I could be very > > wrong on that. > > > > Darren > > > > P.S. Well if the bots are psychotic, and because tromp-taylor rules > > allow suicide, then of course very long cycles are possible, with one > > player always passing, and the other player filling in the same large > > eye over and over... > > My question is more: is a very long cycle possible in a game where both > > players are playing to win? > > > > Four is not the longest, even when you try to win. Quadruple ko takes > eight moves to cycle back. Although not common, it can happen. I had > it happen in a game in the Dutch championship many years ago. > Participation in the World Championship in Japan was on the line, so I > can assure you we were both trying to win. Whether it was ideal play > to let it happen, that's another question altogether... > > I don't know what the longest 'reasonable' cycle would be, but I've > learned not to put my estimates too low with this type of thing in Go. > Before you know it, someone comes up with a 'reasonable' cycle of > longer length than you can count. > > Mark > _______________________________________________ > Computer-go mailing list > [email protected] > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >
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