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[go]$$Bc Joseki?
$$ ------------------
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . 1 . . . . .
$$ | . . . , . . . . .
$$ | . c 3 b . . . . .
$$ | . . 2 a . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]

Hi everyone, this response came up in a game today and I had the hardest time coming up with a response. after checking eidogo, josekipedia, and the joseki database that comes with MFOG, I have been unable to find any significant information about this move. That seems to suggest that it is not joseki and is disadvantageous. In the game I played as follows, but I think I was let off easy.

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[go]$$Bc Joseki?
$$ ------------------
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . O . . . . .
$$ | . 6 4 , . . . . .
$$ | . 1 O 3 . . . . .
$$ | 7 2 X 8 . . . . .
$$ | . 5 . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]

I was eventually able to capture the cutting stones. In retrospect, c was probably the poorest of the choices, but I cant find anything that is obviously good for B. Does anyone have any input?

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[go]$$Bc Joseki transposition?
$$ ------------------
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . 1 . . . . .
$$ | . . 5 , . . . . .
$$ | . . 3 4 . . . . .
$$ | . . 2 . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]

You could try to transpose the position back to the typical joseki shape.

Usually, I believe is played in positions where you want to avoid a pincer (because a closer approach invites one). With , it seems like Black is offering you a position that you might have wanted initially anyways.

GoGoD has 30 or so examples of the attachment. Your hane underneath is one possible reply, which creates its own lines (although in all the pro games White simply pulls back without cutting). The most common idea is to hane on top, which reverts to the usual high approach and attachment underneath joseki. Simply standing reverts to a common joseki for the distant high approach.

Two examples...

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[go]$$Bc Tuo Jiaxi - Wang Lei Sr. 6th Weifu Cup, 2010-09-01
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . 6 . . . . . |
$$ | . . . 9 . 8 . . . . . . . . . O . . . |
$$ | . . X , . . . . 0 , . 7 . . 5 , 2 . . |
$$ | . . . . . . . . . . . . . . . . O 1 . |
$$ | . . . . . . . . . . . . . . . 3 X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , 4 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

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[go]$$Bc Tuo Jiaxi - Luo Xinhe 2010 China Weiqi League, 2010-09-04
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . 6 . . . . . |
$$ | . . . O . . . . . 8 . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 9 . . . . . . . . . . . . 7 . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . 3 . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X 4 . . . . . . . . . . . . . . . |
$$ | . . O 1 . . . . . . . . . . . . . . . |
$$ | . . 2 , . . . . . , . . . . . X . . . |
$$ | . . . O . . . . . . . . . 5 . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

_________________
Dave Sigaty
"Short-lived are both the praiser and the praised, and rememberer and the remembered..."
- Marcus Aurelius; Meditations, VIII 21

A famous example is from 1992, Game 3 of the 40th Oza between 67-year old Fujisawa Shuko and Kobayashi Koichi (at the height of his powers). "The Game of the Year," as nominated by several Japanese professionals that year, turned into a wildfire after this move and a following variation occurred.
Not the mention the result would have been reversed if under Chinese rules.