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 Post subject: Opening issues
Post #1 Posted: Sat Mar 30, 2013 3:06 pm 
Lives with ko
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Click Here To Show Diagram Code
[go]$$Wc
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O . . . . . X . . X 1 . . . . |
$$ | . . O , . . . . . , . . . 2 . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . a . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . 3 . . |
$$ | . . . . . . . . . . . . . . . 4 X . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . , . . . . . , X . . |
$$ | . . X . . O . . O . X . . . X . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

Playing as black in this game, the usual responses of :b2: and :b4: gave white a huge corner that I never did manage to make any impression on. Were they the wrong moves?

After white played at h17 for :w5: , I had a look at invading at A, but chickened out. Would this have been a sensible invasion, or was white already too strong?

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Peter

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 Post subject: Re: Opening issues
Post #2 Posted: Sat Mar 30, 2013 3:21 pm 
Judan

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Your :b2: and :b4: were good, white's kicks, particularly the second, were dubious. White doesn't have a big corner, it has lots of holes in it. The immediate thought after those kicks when you are looking for the shape weakness is the points below, as they make miai of connecting under (a) or else doing something fun if cut off (b). r16 is another possible place to start shenanigans inside, see viewtopic.php?p=133840#p133840.

Click Here To Show Diagram Code
[go]$$Wc
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . a . . . . |
$$ | . . . . O . . . . . X . . X 1 . B . . |
$$ | . . O , . . . . . , . . . 2 . O b . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . b B . . |
$$ | . . . X . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . 3 a . |
$$ | . . . . . . . . . . . . . . . 4 X . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . , . . . . . , X . . |
$$ | . . X . . O . . O . X . . . X . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]


This post by Uberdude was liked by 2 people: Bill Spight, Phoenix
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 Post subject: Re: Opening issues
Post #3 Posted: Sat Mar 30, 2013 11:01 pm 
Lives in gote

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Click Here To Show Diagram Code
[go]$$
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . O . . . . . X . . X O . . . . |
$$ | . . O , . . . . . , . . . X . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . X X . . |
$$ | . . X . . . . . . . . . . . . C C C C |
$$ | . . . . . . . . . . . . . . . C C C C |
$$ | . . . . . . . . . . . . . . . C C C C |
$$ | . . . X . . . . . , . . . . C C X C C |
$$ | . . X . . O . . O . X C C C X C C C C |
$$ | . . . O . . . . . . . C C C C C C C C |
$$ | . . . . . . . . . . . C C C C C C C C |
$$ +---------------------------------------+[/go]

And, further to Andrew's comments, let's not forget the big corner you're building (and that :w3: helped you build a little). If your opponent solidifies his territory in the top right, you should work on building and solidifying the bottom right. They're about the same size.

I must be honest and say that, after :w1:, I'd have played H17. I don't know whether this is good or not - it just feels too good for white if he gets it. The downside is that this lets white solidify his corner while attacking your O17 stone. But that's go.

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 Post subject: Re: Opening issues
Post #4 Posted: Sun Mar 31, 2013 1:53 am 
Honinbo

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Some thoughts on invading. :)

No guarantee that any play is correct. ;)



Happy Easter!

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.


This post by Bill Spight was liked by 3 people: Dusk Eagle, emeraldemon, PeterPeter
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