how should you attack a two space extension assuming it is very close to your thickness?

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what should white do if white plays 9 to make a base near whites thickness?

_________________
Problems worthy of attack prove their worth by hitting back!

Pick up the stone as quickly as possible before black calls the TD.

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Help make L19 more organized. Make an index: https://lifein19x19.com/viewtopic.php?f=14&t=5207

No general answer; that depends entirely on each unique board situation.Probably a typo around "9", missing a co-ordinate letter?
It's more helpful if you use a diagram or an SGF file.
You can read about diagrams here: viewtopic.php?f=5&t=226

Here's a start:

Click Here To Show Diagram Code

[go]$$
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . X O . . . O . . . . . . . . . . |
$$ | . . X , O . . . . , . . . . . X . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

That picture looks like the wrong answer diagram for a fuseki problem.. Also, I don't know what you're talking about because your words seem to have no relation to the picture.

well the source of the diagram isn't necessarily credible but it still doesn't answer how to attack a two space extension. (assuming you are very thick such as in the diagram. Assuming black makes a two space jump towards whites thickness how should white respond? (ie 1 and 2 are played) extending first from thickness doesn't seem like a good option.

_________________
Problems worthy of attack prove their worth by hitting back!

Here are some possible attacks on a two space extension(diagram from senseis):

Click Here To Show Diagram Code

[go]$$B Some possible attacks
$$ ------------
$$ | . . . . . .
$$ | . . . . . .
$$ | . . . . X .
$$ | . . X , . .
$$ | . . . . . .
$$ | . . . . . .
$$ | . . 1 . . .
$$ | . d . . . .
$$ | . . O . . .
$$ | . . . a . .
$$ | . . . b . .
$$ | . . 2 . . .
$$ | . c . . . .
$$ | . . . . . .
$$ | . . X . . .
$$ | . . . , . .[/go]

Like has been said, it very much depends on the rest of the board, but you usually can't kill outright, even with a lot of thickness around.

_________________
a1h1 [1d]: You just need to curse the gods and defend.
Good Go = Shape.
Associação Portuguesa de Go

I think he meant this

Click Here To Show Diagram Code

[go]$$
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . X O . . . O . . . . . . . . . . |
$$ | . . . , O . . . . , . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , X . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . B . . |
$$ | . . . . . . . . . . . . . . O O . . . |
$$ | . . . . . . . . . . . . . O . . O . . |
$$ | . . . O . . . . . , . . O O O O X O . |
$$ | . . . . . . . . . . . . . . X X X X . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]