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Offline leichtloeslich
 Post subject: cute 3x3 problem
Post #1 Posted: Fri Aug 07, 2015 3:45 am 
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stone counting, white just played this brilliant "tesuji"
Click Here To Show Diagram Code
[go]$$W where is your god now?
$$ +-------+
$$ | X . O |
$$ | X X O |
$$ | . O 1 |
$$ +-------+[/go]

black to win

This post by leichtloeslich was liked by 2 people: emeraldemon, hyperpape
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Offline DrStraw
 Post subject: Re: cute 3x3 problem
Post #2 Posted: Fri Aug 07, 2015 4:11 am 
Oza

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Please explain what you mean by stone counting. All I know of is territory and area counting.

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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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Offline leichtloeslich
 Post subject: Re: cute 3x3 problem
Post #3 Posted: Fri Aug 07, 2015 4:47 am 
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Quote:
Please explain what you mean by stone counting.

You count the stones on the board. Whoever has the most at the end of the game wins.
In this example it should be equivalent to area and probably also territory scoring, but I was too lazy to keep track of prisoners in the variations.
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Offline Uberdude
 Post subject: Re: cute 3x3 problem
Post #4 Posted: Fri Aug 07, 2015 5:33 am 
Judan

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So by stone counting you mean Stone Scoring not Stone Counting? ;-) (though perhaps no difference on this board?)
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Offline emeraldemon
 Post subject: Re: cute 3x3 problem
Post #5 Posted: Fri Aug 07, 2015 6:54 am 
Gosei
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Click Here To Show Diagram Code
[go]$$W where is your god now?
$$ +-------+
$$ | X 2 O |
$$ | X X O |
$$ | 3 O 1 |
$$ +-------+[/go]


Click Here To Show Diagram Code
[go]$$W 6 takes vital point?
$$ +-------+
$$ | 7 4 O |
$$ | 5 6 O |
$$ | O O O |
$$ +-------+[/go]



Click Here To Show Diagram Code
[go]$$W I don't think it matters if 9 captures or not
$$ +-------+
$$ | O 9 O |
$$ | O 8 O |
$$ | O O O |
$$ +-------+[/go]


Click Here To Show Diagram Code
[go]$$W Whether or not there is a stone at a, black can easily win from here
$$ +-------+
$$ | . a . |
$$ | . 0 . |
$$ | . . . |
$$ +-------+[/go]
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Offline leichtloeslich
 Post subject: Re: cute 3x3 problem
Post #6 Posted: Fri Aug 07, 2015 7:14 am 
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@emeraldemon
what if white passes with 3 and claims it's a seki with both groups in atari, since black has a bent4 in the corner if he captures?
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Offline Bill Spight
 Post subject: Re: cute 3x3 problem
Post #7 Posted: Fri Aug 07, 2015 7:41 am 
Honinbo

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Click Here To Show Diagram Code
[go]$$W where is your god now?
$$ +-------+
$$ | X 2 O |
$$ | X X O |
$$ | 4 O 1 |
$$ +-------+[/go]


If :w3: captures, :b4: on tengen kills, so White passes.

Click Here To Show Diagram Code
[go]$$W Continuation
$$ +-------+
$$ | X X . |
$$ | X X 5 |
$$ | X 6 7 |
$$ +-------+[/go]


Strange seki. If :b8: captures, :w9: at 5 leads to a win by White, so Black passes. If now :w9: captures, :b10: on tengen kills, so White passes.

Result: B +4

:mrgreen:

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Everything with love. Stay safe.

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