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2-2 invasion behind sansan
http://www.lifein19x19.com/viewtopic.php?f=11&t=15748
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Author:  Phobos [ Fri May 18, 2018 3:05 am ]
Post subject:  2-2 invasion behind sansan

Click Here To Show Diagram Code
[go]$$B
$$ -----------------------------
$$ - . . . . . . .
$$ - . 2 . . . . .
$$ - . 3 1 . . . .
$$ - . 4 . . . . .
$$ - . . . . . . .
$$ - . . . . . . .
$$ - . . . . . . .
$$ - . . . . . . .[/go]


I don't find this sequence in Kogo's Joseki Dictionary.
White in corner is dead but what is the best response for black to :w4: ? And why?
Thank you.
Have a nice day.

Author:  Gomoto [ Fri May 18, 2018 4:13 am ]
Post subject:  Re: 2-2 invasion behind sansan

3 is a big mistake, ELF suggests:

Attachments:
q2.jpg
q2.jpg [ 161.66 KiB | Viewed 5689 times ]

Author:  EdLee [ Fri May 18, 2018 6:01 am ]
Post subject: 

Hi Phobos,

Nice to try Leela's options for :b3: ,
but the game is not decided here.
Example:
Click Here To Show Diagram Code
[go]$$B
$$ ---------------
$$ | . . . . . . .
$$ | . 2 . . . . .
$$ | . 3 1 . . . .
$$ | . 4 5 . . . .
$$ | . 6 7 . . . .
$$ | . . . . . . .
$$ | . . . . . . .[/go]
Depends on the whole board situation.

Author:  Uberdude [ Fri May 18, 2018 11:47 pm ]
Post subject:  Re: 2-2 invasion behind sansan

Psychologically, I want to tenuki the 2-2 just to show my opponent how silly I think he is being (as a general principle when your opponent plays a weird move tenuki is rarely worse than the wrong answer). If white follows up by continuing with the 2-2 it looks bad for him, probably one space approach trying to get passive block is better. Answering more efficiently like Gomoto showed should also suitably embarrass white.

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