Does anyone know the modern pro consensus (if such a thing exists!) on if the one space approach to the Kobayashi is a mistake and if two-space high pincer is the correct punishment? When I learnt that (probably in 2007 on Go to China trip from Peter Liu 2p and friends, or maybe earlier) the reasoning was the sequence below: because black can use the peep of 6 to fix the lower side weakness in sente (thanks to the marked Kobayashi stones) he can take sente to extend to 8, preventing a white counter pincer so white's group is a bit useless and can't make up the territorial loss on the lower side by getting a counter-attack on 2. (Now of course this current game has rather more stones on the board so is different, maybe the 8 here being at j4 would actually be an underplay given strong boring f3 in place).
- Click Here To Show Diagram Code
[go]$$W
$$ +---------------------------------------+
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$$ | . . . O . . . . . , . . . . . X . . . |
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$$ | . . . . . . . . . . . . . . . 8 . . . |
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$$ | . . . . . . . . . . . . . . . 2 . . . |
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$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . 5 7 3 . 1 . . . |
$$ | . . . O . . . . . B . . 6 . . , . . . |
$$ | . . . . . B . . . . . . . 4 . X . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
However, I later heard (second-hand perhaps not accurate) that Korean pros now thought the outside attach was a playable answer for white against the two-space high pincer, that the magic sword need not be feared as white could do ok somehow (wasn't told sequence). When I tried this on KGS I often got this result:
- Click Here To Show Diagram Code
[go]$$Wc
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . , . . . . . X . . . |
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$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . O . . . . . X . . 0 . 3 7 . . . |
$$ | . . . . . X . . . . . . . . 1 X 5 9 . |
$$ | . . . . . . . . . . . . . 4 2 8 6 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
- Click Here To Show Diagram Code
[go]$$Wcm11
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . O . . . . . , . . . . . X . . . |
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$$ | . . . , . . . . . , . . . . . , c . . |
$$ | . . . . . . . . . . . . . . . . . 4 . |
$$ | . . . . . . . . . . . . . . . X 2 3 . |
$$ | . . . . . . . . . . . . . . . . 1 5 . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . O . . . . . X . b X . O O . . . |
$$ | . . . . . X . a . . . . . . O X O O . |
$$ | . . . . . . . . . . . . . X X X X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
This usually seemed playable for white to me as although white is small he is settled and black's lower side is low and still has a gap at
a and there's the weakness at
c too if black doesn't defend there now (which is solid but slow). In fact if black played
on the right instead of joseki on lower side I'm not sure if the fighting is good for white due to black's k4 stone, in the above line black feels a bit inefficient on the lower side. Even so some games I managed to use techniques like
b and crosscut to either break the lower side or kill black's 2nd line group there.
So if this result is ok for white (is it?) should black choose a different pincer like the one-space high? This joseki variation leads to a running fight that makes use of k4.
- Click Here To Show Diagram Code
[go]$$B
$$ +---------------------------------------+
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$$ | . . . O . . . . . , . . . . . X . . . |
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$$ | . . . . . . . . . . . . . . . 0 9 . . |
$$ | . . . . . . . . . . . . . . . 1 8 . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . 2 . O . . . |
$$ | . . . O . . . . . X . . . . . , 6 . . |
$$ | . . . . . X . . . . . . . 3 . X 4 . . |
$$ | . . . . . . . . . . . . . . . . 5 7 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
- Click Here To Show Diagram Code
[go]$$Bm11
$$ +---------------------------------------+
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$$ | . . . O . . . . . , . . . . . X . . . |
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$$ | . . . . . . . . . . . . . . . . 8 . . |
$$ | . . . . . . . . . . . . . . . O X 6 . |
$$ | . . . . . . . . . . . . 9 . 5 X O 2 . |
$$ | . . O . . . . . . . . . . . . 4 1 3 . |
$$ | . . . . . . . . . . . 0 . O . O . . 7 |
$$ | . . . O . . . . . X . . a . . , O . . |
$$ | . . . . . X . . . . . . . X . X O . . |
$$ | . . . . . . . . . . . . . . . . X X . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]
Anyone have anything authoritative on this?