Today I decided to revive an aji corner stone and it worked out quite well leaving me with this position:
I could have made a Weak Carpenter's Square with one leg at C4 (as far as I know that shape turns out as seki?) but decided to play 2-2 for unconditional life with points. It worked in the game, but I wonder whether it really is alive.
Is this corner alive?
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DrStraw
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Re: Is this corner alive?
It is alive after the 2-2. Answer A4 with B3.
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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blue88
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Re: Is this corner alive?
Thanks for your fast answer. I wasn't sure if I had read out all variations and anxiously returned later in the game to spend another move. 
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cyclops
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Re: Is this corner alive?
For fun I tried to kill your shape ( W moving first ) and I found this sequence:
I think I am so I think I am.
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Harleqin
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Re: Is this corner alive?
You should first explore the simpler starting moves, cyclops.
A good system naturally covers all corner cases without further effort.
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illluck
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Re: Is this corner alive?
The 2-2 point might work, but black 2-3 in response seems hard to handle.
First instinct was the clamp (which works, I think), but then realized that the 1-2 point seems cleaner.
First instinct was the clamp (which works, I think), but then realized that the 1-2 point seems cleaner.
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Dusk Eagle
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Re: Is this corner alive?
Just to demonstrate why I belive the clamp works:
I believe C4 also works to kill:
However, if black plays 2-2 before white moves, I see no way for white to kill or make seki.
I believe C4 also works to kill:
However, if black plays 2-2 before white moves, I see no way for white to kill or make seki.
We don't know who we are; we don't know where we are.
Each of us woke up one moment and here we were in the darkness.
We're nameless things with no memory; no knowledge of what went before,
No understanding of what is now, no knowledge of what will be.
Each of us woke up one moment and here we were in the darkness.
We're nameless things with no memory; no knowledge of what went before,
No understanding of what is now, no knowledge of what will be.