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 Post subject: Could I have won this 9x9?
Post #1 Posted: Sat Jun 18, 2011 8:46 am 
Dies with sente
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KGS: kaimat
Online playing schedule: KGS most nights after 8pm CST. Sundays available anytime but on in the morning and evening.


At the end I was hoping to either create a seki or win from the ko. Did I miss any chances or was the game lost from the start?

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 Post subject: Re: Could I have won this 9x9?
Post #2 Posted: Sat Jun 18, 2011 9:34 am 
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61 is unnecessary. If he forces you to play it in sente, he's filling in his own liberty. Play 61 at C9 instead and I think you can get a seki or even maybe win, as it gives you a single eye and prevents his throw-in at 64.

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 Post subject: Re: Could I have won this 9x9?
Post #3 Posted: Sat Jun 18, 2011 9:45 am 
Gosei
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KGS: greendemon
Tygem: greendemon
DGS: smaragdaemon
OGS: emeraldemon
At W53, play H9.

Click Here To Show Diagram Code
[go]$$Wcm1
$$ -------------------
$$ | . . 4 . O X X 1 . |
$$ | . X O O O O X 5 3 |
$$ | . . X O X O X X X |
$$ | . . 2 O X X O O X |
$$ | . . . . X X X O O |
$$ | X X X X X O O O X |
$$ | X O X X O . . O . |
$$ | X O O X O O O . . |
$$ | X . O O . O . . . |
$$ --------------------[/go]


Click Here To Show Diagram Code
[go]$$Wcm1
$$ -------------------
$$ | . . . . O X X 1 . |
$$ | . X O O O O X 3 2 |
$$ | . . X O X O X X X |
$$ | . . . O X X O O X |
$$ | . . . . X X X O O |
$$ | X X X X X O O O X |
$$ | X O X X O . . O . |
$$ | X O O X O O O . . |
$$ | X . O O . O . . . |
$$ --------------------[/go]

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 Post subject: Re: Could I have won this 9x9?
Post #4 Posted: Sat Jun 18, 2011 9:50 am 
Gosei
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KGS: greendemon
Tygem: greendemon
DGS: smaragdaemon
OGS: emeraldemon
If you ever see this shape, alarms should go off in your head:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ -------------------
$$ | . . . . O X X a . |
$$ | . X O O O O X . a |
$$ | . . X O X O X X X |
$$ | . . . O X X O O X |
$$ | . . . . X X X O O |
$$ | X X X X X O O O X |
$$ | X O X X O . . O . |
$$ | X O O X O O O . . |
$$ | X . O O . O . . . |
$$ --------------------[/go]


I'm not sure if that shape has a specific name, but you should watch for it, it's a common shape for making seki & winning capturing races. See also:

http://senseis.xmp.net/?BigEyesCanBeSmallInTheCorner

edit: also this problem

http://senseis.xmp.net/?CapturingRaceExercise13

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 Post subject: Re: Could I have won this 9x9?
Post #5 Posted: Sat Jun 18, 2011 10:29 am 
Dies with sente
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KGS: kaimat
Online playing schedule: KGS most nights after 8pm CST. Sundays available anytime but on in the morning and evening.
It seems so obvious now.

Thanks guys :tmbup:

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 Post subject: Re: Could I have won this 9x9?
Post #6 Posted: Sat Jun 18, 2011 11:23 am 
Lives in sente
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I have commented the game:



Attachments:
kaimat-onacliff.sgf [7.34 KiB]
Downloaded 330 times

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