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[go]$$W
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . O . . . . . , . . . |
$$ | . . . . . X . . . . . X . 1 . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

I don't quite understand the meaning of this move. But it recently appeared in professional games twice and developed into similar situation.

http://www.go4go.net/go/games/sgfview/46156/10
http://www.go4go.net/go/games/sgfview/46132/10

Interesting move! I would not claim to understand every variation, but I would guess the idea is to make miai of 'a' and 'b' below

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[go]$$W
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . O . b . . . , . . . |
$$ | . . . . . X . . . . . X . O . X a . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

In the games, black defends the corner, and the result seems OK for both:

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[go]$$B
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . O 8 2 3 5 1 , . . . |
$$ | . . . . . X . . . . 7 X 4 O . X . . . |
$$ | . . . . . . . . . . 9 6 . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

'a' and 'b' are white's sente later. This looks quite good for white, I would say.

Click Here To Show Diagram Code

[go]$$W
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . O O O X X X , . . . |
$$ | . . . . . X . . . 3 X X O O . X . . . |
$$ | . . . . . . . . . 1 X O 2 . . . . . . |
$$ | . . . . . . . . a b . 4 . . . . . . . |
$$ +---------------------------------------+[/go]

If black does not defend the corner then I guess white will invade it. I wonder what variations will follow! Like this, maybe black 1 is overconcentrated?

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[go]$$B
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . 0 . . |
$$ | . . . . . . . . . . . 1 . . . 5 . . . |
$$ | . . . O . . . . . O . . . . . 3 4 . . |
$$ | . . . . . X . . . . . X . O 9 X 2 . . |
$$ | . . . . . . . . . . . . . . 7 6 8 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

... so maybe black should hane - but what follows next?

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[go]$$W
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . X . . . . . . . |
$$ | . . . O . . . . . O . . . . . 3 2 . . |
$$ | . . . . . X . . . . . X . O . X 1 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

_________________
My name is Gijs, from Utrecht, NL.

When in doubt, play the most aggressive move

I am surprised that the situation even arose. B seems very low at the bottom.

_________________
Still officially AGA 5d but I play so irregularly these days that I am probably only 3d or 4d over the board (but hopefully still 5d in terms of knowledge, theory and the ability to contribute).

My first instinct says no.
after careful consideration still no.
Try to convince me and I will show you y u r wrong.

_________________
"The more we think we know about
The greater the unknown"
Words by neil peart, music by geddy lee and alex lifeson