4-4 pincer double-approach Joseki mistake?

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Fredrik
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Re: 4-4 pincer double-approach Joseki mistake?

Post by Fredrik »

Click Here To Show Diagram Code
[go]$$Wworse for Black
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . . 4 2 3 . |
$$ . . . O . X O . . |
$$ . . . . . X O . . |
$$ . . . . . X X O . |
$$ . . . . . X O 1 . |
$$ . . . . . . . . . |
$$ . . . . . . X . . |
$$ . . . . . . . . . |
$$ . . . . . , . . . |[/go]




Click Here To Show Diagram Code
[go]$$W
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . . 2 3 . . |
$$ . . . O . X O . . |
$$ . . . . . X O . . |
$$ . . . . . X X O . |
$$ . . . . . X O 1 . |
$$ . . . . . . . . . |
$$ . . . . . . X . . |
$$ . . . . . . . . . |
$$ . . . . . , . . . |[/go]


:w13: is possible, not needed though. Depends on the players style.

Click Here To Show Diagram Code
[go]$$Worse for Black
$$ ------------------
$$ . . . . . . . 2 . |
$$ . . . . . X X O . |
$$ 1 . . O . X O a . |
$$ . . . . . X O . . |
$$ 9 . . . . X X O . |
$$ . . . . . X O O . |
$$ . . . . . 4 3 . . |
$$ . . . . . . X 5 . |
$$ . . . . . . 6 7 . |
$$ . . . . . , 8 b . |
$$ . . . . . , . . . |
$$ . . . . . , . . . |
$$ . . . . . , . . . |[/go]


A and B is miai, please note that white 1 and 9 is just showing tenuki.
Ideally they will be at middle-hoshi (K16) and an approach in upperleft-corner. Black gets thick but white is fast. This variation is slightly inferior to the next one because: Probably Black will exchange B for A which could have been better if he had extended immediately:



Click Here To Show Diagram Code
[go]$$Worse for Black
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . . X . 2 . |
$$ 1 . . O . X O . . |
$$ . . . . . X O . . |
$$ 9 . . . . X X O . |
$$ . . . . . X O O . |
$$ . . . . . 4 3 . . |
$$ . . . . . . X 5 . |
$$ . . . . . . 6 7 . |
$$ . . . . . , 8 b . |
$$ . . . . . , . . . |
$$ . . . . . , . . . |
$$ . . . . . , . . . |[/go]


Click Here To Show Diagram Code
[go]$$B Worse for Black
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . . X a X . |
$$ O . . O . X O . . |
$$ . . . . . X O . . |
$$ O . . . . X X O . |
$$ . . . . . X O O . |
$$ . . . . . X O . 2 |
$$ . . . . . . X O . |
$$ . . . . . . X O . |
$$ . . . . . , X 1 . |
$$ . . . . . , . . . |
$$ . . . . . , . . . |
$$ . . . . . , . . . |[/go]



In this variation, later Black can connect at a in sente (or capture the 2 stones in sente as payment, Black will most likely get this move in yose). Like this, Blacks territority in the corner is bigger than the other variation.

Also there is also another reason,



Click Here To Show Diagram Code
[go]$$W
$$ ------------------
$$ . . . . . 6 4 5 . |
$$ . . . . . 2 3 7 . |
$$ . . . O . X O . . |
$$ . . . . . X O . . |
$$ . . . . . X X O . |
$$ . . . . . X O 1 . |
$$ . . . . . . . . . |
$$ . . . . . . X . . |
$$ . . . . . . . . . |
$$ . . . . . , . . . |[/go]


If Black later can get 4 and 6 in sente, it will help him attacking/developing the top. Please note that the amount of territority in white's corner would be the same as if Black hane and white defended on the first line. ( :b3: :w7: :b2: :w5: ).
Last edited by Fredrik on Thu Feb 17, 2011 3:43 pm, edited 1 time in total.
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fwiffo
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Re: 4-4 pincer double-approach Joseki mistake?

Post by fwiffo »

That totally clears it up for me. Awesome.
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