Any hope for White here? 9x9

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SuprunP
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Any hope for White here? 9x9

Post by SuprunP »

Is there any hope for White here?

Click Here To Show Diagram Code
[go]$$Bc Is there any hope for White here?
$$ ---------------------
$$ | . . . . . . . . . |
$$ | . X O O X X X X . |
$$ | . 1 , O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Thanks.
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jts
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Re: Any hope for White here? 9x9

Post by jts »

To win or to live?
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SuprunP
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Re: Any hope for White here? 9x9

Post by SuprunP »

jts wrote:To win or to live?


To at least live, as far as I can see it.
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billywoods
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Re: Any hope for White here? 9x9

Post by billywoods »

It seems white can ask for seki, but black can decline and force a ko. Here are the few variations I read out:

Click Here To Show Diagram Code
[go]$$W Ko (or else white dies)
$$ ---------------------
$$ | . 1 . . . . . . . |
$$ | . X O O X X X X . |
$$ | 2 X , O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$W White starts a ko
$$ ---------------------
$$ | . 1 . 4 . . . . . |
$$ | 5 X O O X X X X . |
$$ | 2 X , O O X O . . |
$$ | 3 O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$W Same ko
$$ ---------------------
$$ | . 1 . 4 . . . . . |
$$ | 5 X O O X X X X . |
$$ | 2 X 3 O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$W Seki
$$ ---------------------
$$ | . 2 5 4 6 . . . . |
$$ | 3 X O O X X X X . |
$$ | 1 X , O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$W Black offers a ko...
$$ ---------------------
$$ | . . . . . . . . . |
$$ | 2 X O O X X X X . |
$$ | 1 X , O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$W Ko
$$ ---------------------
$$ | . 3 . . . . . . . |
$$ | 2 X O O X X X X . |
$$ | 1 X . O O X O . . |
$$ | 4 O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$W White can't decline the ko, otherwise he dies
$$ ---------------------
$$ | . 4 5 . . . . . . |
$$ | 2 X O O X X X X . |
$$ | 1 X , O O X O . . |
$$ | 3 O O O X O O X . |
$$ | O X X X X X X O . |
$$ | 6 X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


Click Here To Show Diagram Code
[go]$$W Different move order, reverts to a previous ko
$$ ---------------------
$$ | . 3 . 4 . . . . . |
$$ | 1 X O O X X X X . |
$$ | 2 X , O O X O . . |
$$ | 5 O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]
Last edited by billywoods on Sat Feb 23, 2013 5:53 pm, edited 1 time in total.
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Dragon Pie
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Re: Any hope for White here? 9x9

Post by Dragon Pie »

Click Here To Show Diagram Code
[go]$$W Ko
$$ ---------------------
$$ | . 3 . 4 . . . . . |
$$ | 2 X O O X X X X . |
$$ | 1 X 5 O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


How is this a ko?

This looks best to me as black gets to take first.

Click Here To Show Diagram Code
[go]$$W Ko
$$ ---------------------
$$ | . 1 . 2 . . . . . |
$$ | 3 X O O X X X X . |
$$ | 4 X . O O X O . . |
$$ | 5 O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]
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jts
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Re: Any hope for White here? 9x9

Post by jts »

Dragon Pie wrote:
Click Here To Show Diagram Code
[go]$$W Ko
$$ ---------------------
$$ | . 3 . 4 . . . . . |
$$ | 2 X O O X X X X . |
$$ | 1 X 5 O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


How is this a ko?

Yeah, isn't 5 just removing a lib? If b wants to avoid seki he needs to start the ko with 4.
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billywoods
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Re: Any hope for White here? 9x9

Post by billywoods »

jts wrote:
Dragon Pie wrote:
Click Here To Show Diagram Code
[go]$$W Ko
$$ ---------------------
$$ | . 3 . 4 . . . . . |
$$ | 2 X O O X X X X . |
$$ | 1 X 5 O O X O . . |
$$ | . O O O X O O X . |
$$ | O X X X X X X O . |
$$ | . X . . X . O . . |
$$ | . . O . O O , . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ ---------------------[/go]


How is this a ko?

Yeah, isn't 5 just removing a lib? If b wants to avoid seki he needs to start the ko with 4.

Oops. Thanks! Not sure how 4 and 5 got there - I must have got confused typing the diagrams.
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