Go Problem!

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Kirby
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Go Problem!

Post by Kirby »

I thought this go problem was interesting:
Click Here To Show Diagram Code
[go]$$c
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . , X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
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Dusk Eagle
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Re: Go Problem!

Post by Dusk Eagle »

Is it ko?
Click Here To Show Diagram Code
[go]$$c
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | 3 . O . . . . . . . . . . . . . . . . |
$$ | 2 1 4 X . . . . . . . . . . . . . . . |
$$ | 7 6 5 , X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
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.
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moyoaji
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Re: Go Problem!

Post by moyoaji »

Alright. Let's look at this. It seems like :b1: is the vital point, but what can white do?
Click Here To Show Diagram Code
[go]$$c Vital point?
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . 1 . X . . . . . . . . . . . . . . . |
$$ | . . . , X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$c White fails - shortage of liberties
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . 1 2 X . . . . . . . . . . . . . . . |
$$ | . 5 3 4 X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$c White fails - shortage of liberties
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . 1 2 X . . . . . . . . . . . . . . . |
$$ | . 4 3 5 X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$c White fails - connect and die
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 4 X . . . . . . . . . . . . . . . |
$$ | . 6 5 7 X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$c White fails - still connect and die
$$ | . 7 . . . . . . . . . . . . . . . . . |
$$ | 6 5 O . O . . . . . . . . . . . . . . |
$$ | 4 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 8 X . . . . . . . . . . . . . . . |
$$ | . 0 9 B X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Is there anything I am missing?
"You have to walk before you can run. Black 1 was a walking move.
I blushed inwardly to recall the ignorant thoughts that had gone through
my mind before, when I had not realized the true worth of Black 1."

-Kageyama Toshiro on proper moves
DrStraw
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Re: Go Problem!

Post by DrStraw »

Click Here To Show Diagram Code
[go]$$c Black needs to be careful if :w6:
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 6 O . O . . . . . . . . . . . . . . |
$$ | 7 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 4 X . . . . . . . . . . . . . . . |
$$ | . 8 5 . X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$c This works.
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 6 O . O . . . . . . . . . . . . . . |
$$ | 8 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 4 X . . . . . . . . . . . . . . . |
$$ | . 9 5 7 X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/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).
Kirby
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Re: Go Problem!

Post by Kirby »

DrStraw wrote:
Click Here To Show Diagram Code
[go]$$c Black needs to be careful if :w6:
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 6 O . O . . . . . . . . . . . . . . |
$$ | 7 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 4 X . . . . . . . . . . . . . . . |
$$ | . 8 5 . X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$c This works.
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 6 O . O . . . . . . . . . . . . . . |
$$ | 8 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 4 X . . . . . . . . . . . . . . . |
$$ | . 9 5 7 X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Click Here To Show Diagram Code
[go]$$c This works.
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 4 O . O . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 . X . . . . . . . . . . . . . . . |
$$ | . . . . X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
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moyoaji
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Re: Go Problem!

Post by moyoaji »

Kirby wrote:
Click Here To Show Diagram Code
[go]$$c This works.
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 4 O . O . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 . X . . . . . . . . . . . . . . . |
$$ | . . . . X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Looks like ko again.
Click Here To Show Diagram Code
[go]$$c Ko, white cannot take at 'a' or it is self-atari.
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . 4 O . O . . . . . . . . . . . . . . |
$$ | 5 3 O . . . . . . . . . . . . . . . . |
$$ | 2 1 6 X . . . . . . . . . . . . . . . |
$$ | 9 8 7 a X . . . . , . . . . . , . . . |
$$ | O O O O X . . . . . . . . . . . . . . |
$$ | X X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
"You have to walk before you can run. Black 1 was a walking move.
I blushed inwardly to recall the ignorant thoughts that had gone through
my mind before, when I had not realized the true worth of Black 1."

-Kageyama Toshiro on proper moves
DrStraw
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Contact:

Re: Go Problem!

Post by DrStraw »

It seems that group think has arrived at the 1p solution - or have we?. Where does the problem come from?
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).
Kirby
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Re: Go Problem!

Post by Kirby »

DrStraw wrote:It seems that group think has arrived at the 1p solution - or have we?. Where does the problem come from?
Yes, the answer is ko. The first reply works, and like moyoaji pointed out, ko can be reached from your starting move, too.

The problem came from a lecture I watched, and I liked the shape, so I posted it here.
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