a Tsumego that cropped up in one of my games

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shapenaji
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a Tsumego that cropped up in one of my games

Post by shapenaji »

hey folks, just had this little fun one, thought I'd share (simplified a bit):

Click Here To Show Diagram Code
[go]$$ White to move and kill the marked stones
$$ - - - - - - - - - - - -
$$ | . . . . . . . B O . .
$$ | . . . . X O . B O . .
$$ | . . . . X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


(I say just the marked stones because I'm not positive yet that black can't give them up in some inventive way for life in the corner. If you find something, let me know!)
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tj86430
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Re: a Tsumego that cropped up in one of my games

Post by tj86430 »

I'd start with:

Click Here To Show Diagram Code
[go]$$ White to move and kill the marked stones
$$ - - - - - - - - - - - -
$$ | . . . . . . . X O . .
$$ | . . W . X O . X O . .
$$ | . . . . X O X X O . .
$$ | . . . O O X X O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]
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topazg
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Re: a Tsumego that cropped up in one of my games

Post by topazg »

Click Here To Show Diagram Code
[go]$$W White to move and kill the marked stones
$$ - - - - - - - - - - - -
$$ | . . . . . 1 . B O . .
$$ | . . a . X O . B O . .
$$ | . . b . X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


That's my first instinct, as Black "a" doesn't now seem to work. Haven't read out black "b" properly yet.

Click Here To Show Diagram Code
[go]$$W White kills everything
$$ - - - - - - - - - - - -
$$ | . . . 6 7 1 . B O . .
$$ | . . 2 3 X O . B O . .
$$ | . . 5 4 X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


Click Here To Show Diagram Code
[go]$$W This doesn't seem to work ... yet
$$ - - - - - - - - - - - -
$$ | . . . . . 1 . B O . .
$$ | . . 3 . X O . B O . .
$$ | . 5 2 4 X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


Click Here To Show Diagram Code
[go]$$B Got 'em, but can't be good!
$$ - - - - - - - - - - - -
$$ | . . . . 6 O . B O . .
$$ | . . O . X O . B O . .
$$ | . O X X X O B B O . .
$$ | . 2 1 O O B B O O . .
$$ | . 5 O 3 4 . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


@TJ:

Click Here To Show Diagram Code
[go]$$W White to move and kill the marked stones
$$ - - - - - - - - - - - -
$$ | . . . . . 2 4 B O . .
$$ | . . 1 . X 5 . B O . .
$$ | . . 6 . X . B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


Does this not work for Black?
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shapenaji
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Re: a Tsumego that cropped up in one of my games

Post by shapenaji »

topazg wrote:
Click Here To Show Diagram Code
[go]$$W White to move and kill the marked stones
$$ - - - - - - - - - - - -
$$ | . . . . . 1 . B O . .
$$ | . . a . X O . B O . .
$$ | . . b . X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


That's my first instinct, as Black "a" doesn't now seem to work. Haven't read out black "b" properly yet.

Click Here To Show Diagram Code
[go]$$W White kills everything
$$ - - - - - - - - - - - -
$$ | . . . 6 7 1 . B O . .
$$ | . . 2 3 X O . B O . .
$$ | . . 5 4 X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


Click Here To Show Diagram Code
[go]$$W This doesn't seem to work ... yet
$$ - - - - - - - - - - - -
$$ | . . . . . 1 . B O . .
$$ | . . 3 . X O . B O . .
$$ | . 5 2 4 X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


Click Here To Show Diagram Code
[go]$$B Got 'em, but can't be good!
$$ - - - - - - - - - - - -
$$ | . . . . 6 O . B O . .
$$ | . . O . X O . B O . .
$$ | . O X X X O B B O . .
$$ | . 2 1 O O B B O O . .
$$ | . 5 O 3 4 . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


@TJ:

Click Here To Show Diagram Code
[go]$$W White to move and kill the marked stones
$$ - - - - - - - - - - - -
$$ | . . . . . 2 4 B O . .
$$ | . . 1 . X 5 . B O . .
$$ | . . 6 . X . B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


Does this not work for Black?

To Topaz:
"b" is indeed the interesting variation, AND the one that was played


To TJ:
that variation results in ko...
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topazg
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Re: a Tsumego that cropped up in one of my games

Post by topazg »

shapenaji wrote:
"b" is indeed the interesting variation, AND the one that was played


Interesting - how far did it get, and where did I go wrong? :D

And, were you White?
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shapenaji
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Re: a Tsumego that cropped up in one of my games

Post by shapenaji »

topazg wrote:
Interesting - how far did it get, and where did I go wrong? :D

And, were you White?


This is what was played if you're curious, (and yes, I'm white):

Click Here To Show Diagram Code
[go]$$ White to move and kill the marked stones
$$ - - - - - - - - - - - -
$$ | . 9 8 . . 2 . B O . .
$$ | . 7 6 5 1 O . B O . .
$$ | . a 3 4 X O B B O . .
$$ | . . . O O B B O O . .
$$ | . . O . . . . O . . .
$$ | . O X . . O . . . . .
$$ | . . . . . . . . . . .
$$ | . . O X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . X X . . . . . . .[/go]


and then "a" and the throw in kills, black can't take both an eye in the corner AND prevent the pseudo-seki on the right
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Re: a Tsumego that cropped up in one of my games

Post by cyclops »

B3@5 in the diagram above is refuted by a nice tesuji:
Click Here To Show Diagram Code
[go]$$Bc a->b->c->6->10->d->6->e
$$ +---------------------
$$ | c 9 d b 4 O . X O .
$$ | 0 6 3 5 X O . X O .
$$ | a 7 2 1 X O X X O .
$$ | . e 8 O O X X O O ,
$$ | . . O . . . . O . .
$$ | . O X . . O . . . .
$$ | . . . . . . . . . .
$$ | . . O X . . . . . .
$$ | . . . . . . . . . .
$$ | . . X X . . . . . ,
$$ | . . . . . . . . . .[/go]
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