SkArcher on 4 Dec 2003 00:40:14 -0000


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Re: [spoon-discuss] Re: [Spoon-business] A three headed monkey!


On Wed, 3 Dec 2003 18:30:52 -0600, Baron von Skippy <bvs@xxxxxxxxxx> wrote:

I place a stone at H7. This captures BvS' stones at G7, H8, G8, F8, and
F9, and Rob's stone at E8.

-Nice try, boys, but you are so far from right it's almost funny. Because of my alliance with bd, those stones are protected by a link to him at F10. I count five more liberties for those stones. Someone might want to fix the Wiki accordingly.-


Ahh, I'm afraid it is you who is mistaken Baron. You see, its not a _players_ stones which are captured, it is a dragons - and the dragon formed by yours and Robs stones is NOT given a liberty by bd's stone, because bd is NOT a mutual ally of yours and robs.

the relevant text is in the political Go rule (r1639/3) section D, and reads

"A Dragon is a set of adjacent Stones that belong to players who are all Allied with each other, and that are not adjacent to any other stones belonging to a mutual ally of those players. [[This ensures that all Dragons are of maximal size.]] If alliances are not transitive, it is possible for a stone to be part of more than one Dragon. [[For example, if A is allied with B and B is allied with C, then in the formation AAABBCCC, the B stones are in both the AB dragon and the BC dragon.]]

A Liberty is an empty position adjacent to a Dragon (possibly on the interior of it). If a Dragon has no Liberties, then it is Captured."

Therefore, our moves are corect.


Have a nice day :)


SkArcher
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