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cute 3x3 problem
http://prod.lifein19x19.com/viewtopic.php?f=15&t=12139		 Page 1 of 1
Author:  leichtloeslich [ Fri Aug 07, 2015 3:45 am ]
Post subject:  cute 3x3 problem
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
Author:  DrStraw [ Fri Aug 07, 2015 4:11 am ]
Post subject:  Re: cute 3x3 problem
Please explain what you mean by stone counting. All I know of is territory and area counting.
Author:  leichtloeslich [ Fri Aug 07, 2015 4:47 am ]
Post subject:  Re: cute 3x3 problem
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.
Author:  Uberdude [ Fri Aug 07, 2015 5:33 am ]
Post subject:  Re: cute 3x3 problem
So by stone counting you mean Stone Scoring not Stone Counting? ;-) (though perhaps no difference on this board?)
Author:  emeraldemon [ Fri Aug 07, 2015 6:54 am ]
Post subject:  Re: cute 3x3 problem
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]
Author:  leichtloeslich [ Fri Aug 07, 2015 7:14 am ]
Post subject:  Re: cute 3x3 problem
@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?
Author:  Bill Spight [ Fri Aug 07, 2015 7:41 am ]
Post subject:  Re: cute 3x3 problem
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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