Alive or just Ko

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paK0
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Alive or just Ko

Post by paK0 »

Hi, I just lost a game by 0,5 points because I could not figure this out in the 20 seconds that I had. Even after looking now I can only ever get kos, but I feel like the corner should be alive unconditional(maybe I read it somewhere).

Any help highly appreciated.

Click Here To Show Diagram Code
[go]$$B B to play
$$ ------------------
$$ | . . X O . . . . .
$$ | . . X O . . . . .
$$ | O . X O . . . . .
$$ | . X X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
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Re: Alive or just Ko

Post by Kirby »

Just ko :-)
be immersed
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paK0
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Re: Alive or just Ko

Post by paK0 »

Thanks, gonna go sue Janice Kim now for writing that all 7+ eyeshapes are alive x.X
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leichtloeslich
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Re: Alive or just Ko

Post by leichtloeslich »

It's ko. However, if you had a few more outside liberties it would be alive. Can you figure out the minimum number of outside liberties required for unconditional life?
paK0 wrote:gonna go sue Janice Kim now for writing that all 7+ eyeshapes are alive
Liberties matter (as do cuts).
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Re: Alive or just Ko

Post by Dusk Eagle »

paK0 wrote:Thanks, gonna go sue Janice Kim now for writing that all 7+ eyeshapes are alive x.X
She almost certainly meant in the center of the board, without any cuts in the inside shape. Being on the corner or the side of the board can really change things.
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paK0
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Re: Alive or just Ko

Post by paK0 »

leichtloeslich wrote:It's ko. However, if you had a few more outside liberties it would be alive. Can you figure out the minimum number of outside liberties required for unconditional life?
Considering the fact that I just tried 15 minutes and can still not make living shape even disregarding outside liberties - no =)
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Re: Alive or just Ko

Post by DrStraw »

Looks alive in mannen ko to me. While not technically 100% alive it is as good as alive in practice.
Click Here To Show Diagram Code
[go]$$B B to play
$$ ------------------
$$ | 3 . X O . . . . .
$$ | 2 1 X O . . . . .
$$ | O . X O . . . . .
$$ | . X X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
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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Re: Alive or just Ko

Post by RBerenguel »

paK0 wrote:Thanks, gonna go sue Janice Kim now for writing that all 7+ eyeshapes are alive x.X
There's a stone in there anyway... 6 spaces :)
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Re: Alive or just Ko

Post by HermanHiddema »

DrStraw wrote:Looks alive in mannen ko to me. While not technically 100% alive it is as good as alive in practice.
Click Here To Show Diagram Code
[go]$$B B to play
$$ ------------------
$$ | 3 . X O . . . . .
$$ | 2 1 X O . . . . .
$$ | O . X O . . . . .
$$ | . X X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
Yup, It's mannen ko, but :b3: above is not even required, so it is also sente for black.
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Re: Alive or just Ko

Post by DrStraw »

HermanHiddema wrote:
DrStraw wrote:Looks alive in mannen ko to me. While not technically 100% alive it is as good as alive in practice.
Yup, It's mannen ko, but :b3: above is not even required, so it is also sente for black.
Right. That was to make it clearer for anyone who did not see it.
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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Re: Alive or just Ko

Post by Bill Spight »

paK0 wrote:Thanks, gonna go sue Janice Kim now for writing that all 7+ eyeshapes are alive x.X
I can hardly believe that she wrote that. She knew better.
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Re: Alive or just Ko

Post by Bill Spight »

The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.
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Re: Alive or just Ko

Post by snorri »

paK0 wrote:
Click Here To Show Diagram Code
[go]$$B B to play
$$ ------------------
$$ | . . X O . . . . .
$$ | . . X O . . . . .
$$ | O . X O . . . . .
$$ | . X X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
Of course it's nice to be able to solve the life and death problem, but another skill is to ask: how did I get in this situation to begin with? I would like to see the actual game sequence, but if it was possible to play the following shape instead...wouldn't it be happier? But be careful...read what white can do.
Click Here To Show Diagram Code
[go]$$W status?
$$ ------------------
$$ | . . X O . . . . .
$$ | . . X O . . . . .
$$ | X . X O . . . . .
$$ | . . X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
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paK0
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Re: Alive or just Ko

Post by paK0 »

Ah, now I see why the libarities matter, I just reached the L on the first line and thought it was dead



@snorri: seems alive to me, but knowing my reading skills....
Click Here To Show Diagram Code
[go]$$W status?
$$ ------------------
$$ | . . X O . . . . .
$$ | . a X O . . . . .
$$ | X b X O . . . . .
$$ | 2 1 X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
a and b miai


Click Here To Show Diagram Code
[go]$$W status?
$$ ------------------
$$ | . . X O . . . . .
$$ | . 2 X O . . . . .
$$ | X 1 X O . . . . .
$$ | . . X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
Bill Spight
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Re: Alive or just Ko

Post by Bill Spight »

Click Here To Show Diagram Code
[go]$$Wc
$$ ------------------
$$ | . 5 X O . . . . .
$$ | 3 . X O . . . . .
$$ | X 4 X O . . . . .
$$ | 2 1 X O . . . . .
$$ | X X O O . . . . .
$$ | O O O . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.
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