Tsumego question
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DrStraw
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Re: Tsumego question
No, R18 makes miai of playing below or to the right.
Still officially AGA 5d but I play so irregularly these days that I am probably only 3d or 4d over the board (but hopefully still 5d in terms of knowledge, theory and the ability to contribute).
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luigi
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Re: Tsumego question
I thought this was seki, but I was seeing it wrong. The White stone at 1-2 isn't connected to the rest. 
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Cassandra
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Re: Tsumego question
This is not the problem here.luigi wrote:I thought this was seki, but I was seeing it wrong. The White stone at 1-2 isn't connected to the rest.
If the problem was not in the corner, but at the side, your suggestion would end in seki.
In the corner-shape, Black can give atari from the outside, so Black's three stones inside form a dead eye-shape.
At the side, White's group has two liberties left inside. Black can give atari only by creating a shape inside that consist of four stones in a row. Capturing these four stones results in a living shape for White.
The really most difficult Go problem ever: https://igohatsuyoron120.de/index.htm
Igo Hatsuyōron #120 (really solved by KataGo)
Igo Hatsuyōron #120 (really solved by KataGo)