Well... In this diagram, black's three stones are also surrounded, but they're alive in seki. So what's the difference between the this one and the following that makes it different?paullik wrote:Because it's only now that theskydyr wrote:Yes, in a sense, but do you understand why it's white's territory now and not before?paullik wrote: Since they are inside white's territory, right?are surrounded.
Why only after two black moves is white dead?
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skydyr
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Re: Why only after two black moves is white dead?
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paullik
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Re: Why only after two black moves is white dead?
The number of liberties of the white stones, which in fact lead to seki or to killing the three black stones.skydyr wrote: Well... In this diagram, black's three stones are also surrounded, but they're alive in seki. So what's the difference between the this one and the following that makes it different?
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skydyr
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Re: Why only after two black moves is white dead?
Well, if black plays here: Isn't the number of liberties the same as before? White has 5 liberties in this and the other diagram.paullik wrote:The number of liberties of the white stones, which in fact lead to seki or to killing the three black stones.skydyr wrote: Well... In this diagram, black's three stones are also surrounded, but they're alive in seki. So what's the difference between the this one and the following that makes it different?
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Joaz Banbeck
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Re: Why only after two black moves is white dead?
Help make L19 more organized. Make an index: https://lifein19x19.com/viewtopic.php?f=14&t=5207
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gowan
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Re: Why only after two black moves is white dead?
In this diagram
White has three "outside" liberties so white can play at a and b (if necessary) so in the end the shape will be
The empty points inside White's group make four in a line which is alive.
If Black plays first as in the next diagram, White lives in seki, as do the three surrounded black stones.
So in either case, White lives. In one case White gets points, in the other no points, but White lives in both cases.
White has three "outside" liberties so white can play at a and b (if necessary) so in the end the shape will be
The empty points inside White's group make four in a line which is alive.
If Black plays first as in the next diagram, White lives in seki, as do the three surrounded black stones.
So in either case, White lives. In one case White gets points, in the other no points, but White lives in both cases.
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paullik
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Re: Why only after two black moves is white dead?
I wouldn't have thought about this, since I was still looking at the problem from the point where black dies or not, not considering the fact that white remains alive.gowan wrote: So in either case, White lives. In one case White gets points, in the other no points, but White lives in both cases.
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EdLee
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