Tsumego Fun for Low Dan (2019 June 6th)

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tchan001
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Tsumego Fun for Low Dan (2019 June 6th)

Post by tchan001 »

Chapter 1 Foundation Problems - Problem 24 from a new book 基礎から始める河野臨の詰碁 ISBN9784839967307
Rated as appropriate for low dan level. Enjoy
Black to move
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O . O X . . . . ,
$$ | . . . O X X X X X .
$$ | O . . . O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
Will give the answer under hide in about a week or two.
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Shaddy
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Shaddy »

Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O 2 O X . . . . ,
$$ | . . 1 O X X X X X .
$$ | O . . 3 O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
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Joaz Banbeck
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Joaz Banbeck »

Without reading, my vital point sensibilities say this:
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O . O X . . . . ,
$$ | . . . O X X X X X .
$$ | O . 1 . O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
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Joaz Banbeck
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Joaz Banbeck »

Shaddy wrote:
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O 2 O X . . . . ,
$$ | . . 1 O X X X X X .
$$ | O . . 3 O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
What if white does not get greedy?
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O . O X . . . . ,
$$ | . . 1 O X X X X X .
$$ | O . 2 . O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
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Shaddy
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Shaddy »

Joaz Banbeck wrote:
Shaddy wrote:
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O 2 O X . . . . ,
$$ | . . 1 O X X X X X .
$$ | O . . 3 O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
What if white does not get greedy?
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O . O X . . . . ,
$$ | . . 1 O X X X X X .
$$ | O . 2 . O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
Just atari kills.
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Knotwilg
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Knotwilg »

Two refutations
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O 3 O X . . . . ,
$$ | . 5 1 O X X X X X .
$$ | O 6 2 4 O 0 . . X .
$$ | . 8 . 9 7 . . . X .
$$ +---------------------[/go]
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O 6 O X . . . . ,
$$ | . 3 5 O X X X X X .
$$ | O 4 1 2 O . . . X .
$$ | . . . . . . . . X .
$$ +---------------------[/go]
Main line: edit, no
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | 5 O 7 O X . . . . ,
$$ | 6 4 8 O X X X X X .
$$ | O 3 1 2 O a b . X .
$$ | . 9 . d . c . . X .
$$ +---------------------[/go]
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Shaddy
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Shaddy »

Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | X X X X X . . . . .
$$ | . O 3 O X . . . . ,
$$ | . 5 1 O X X X X X .
$$ | O 6 2 4 O 0 . . X .
$$ | . 8 . 9 7 . . . X .
$$ +---------------------[/go]
5 @ 6
In your main line, 6 @ 1-2 point makes ko
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by tchan001 »

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Joaz Banbeck
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Joaz Banbeck »

tchan001 wrote:...
Click Here To Show Diagram Code
[go]$$B
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | X X X X X . . . . . . . . . . . . . . |
$$ | 5 O 7 O X . . . . , . . . . . , . . . |
$$ | 6 4 8 O X X X X X . . . . . . . . . . |
$$ | O 3 1 2 O 0 . . X . . . . . . . . . . |
$$ | . 9 . . . . . . X . . . . . . . . . . |
$$ ---------------------------------------[/go]
...then...
Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | X X X X X . . . . . . . . . . . . . . |
$$ | X O X O X . . . . , . . . . . , . . . |
$$ | O O O O X X X X X . . . . . . . . . . |
$$ | O X X O O O . . X . . . . . . . . . . |
$$ | . X . . . 1 . . X . . . . . . . . . . |
$$ ---------------------------------------[/go]
...Ko...
Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | X X X X X . . . . . . . . . . . . . . |
$$ | X O X O X . . . . , . . . . . , . . . |
$$ | O O O O X X X X X . . . . . . . . . . |
$$ | O X X O O O . . X . . . . . . . . . . |
$$ | . X . . . . 1 . X . . . . . . . . . . |
$$ ---------------------------------------[/go]
Maybe I'm missing something, but if black plays G1 instead of F1, I see no ko. White looks dead to me.

I still think that C2 kills.
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Shaddy
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by Shaddy »

Click Here To Show Diagram Code
[go]$$B
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | X X X X X . . . . . . . . . . . . . . |
$$ | 5 O . O X . . . . , . . . . . , . . . |
$$ | 7 4 . O X X X X X . . . . . . . . . . |
$$ | O 3 1 2 O . . . X . . . . . . . . . . |
$$ | . 6 . . . . . . X . . . . . . . . . . |
$$ ---------------------------------------[/go]
Ko
Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | X X X X X . . . . . . . . . . . . . . |
$$ | X O X O X . . . . , . . . . . , . . . |
$$ | O O O O X X X X X . . . . . . . . . . |
$$ | O X X O O O . . X . . . . . . . . . . |
$$ | . X . 3 . 2 1 . X . . . . . . . . . . |
$$ ---------------------------------------[/go]
Seki
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tchan001
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Re: Tsumego Fun for Low Dan (2019 June 6th)

Post by tchan001 »

Books are not always correct but as I am not a tsumego expert, I can only provide the answer from the book.
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