There's one more option to consider in addition to the options in Bill's post.
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[go]$$W Yet another choice
$$ ----------------------+
$$ . . . . . . . . . . . |
$$ . . . . . 5 . . . . . |
$$ . . . 9 4 1 2 . . . . |
$$ . X . . 7 6 8 X . . . |
$$ . . . . 0 3 . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . , . . . . . X . . . |
$$ . . . . . . . . . . . |[/go]
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[go]$$Bm11 Continutation
$$ ----------------------+
$$ . . . . . . . . . . . |
$$ . . a . . O b . . . . |
$$ . . . O X O X . . . . |
$$ . X . 2 O X X X . . . |
$$ . . . 3 1 O . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . , . . . . . X . . . |
$$ . . . . . . . . . . . |[/go]
There are quite a few choices after this so I won't give more diagramgs (e.g. a or b for white).
Is this any good for black? It depends! It's a reasonable way of getting a moyo.
Tewari offers a clue:
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[go]$$W Tewari
$$ ----------------------+
$$ . . . . . . . . . . . |
$$ . . . . . 7 c . . . . |
$$ . . . b a 1 2 . . . . |
$$ . X . 9 5 4 6 X . . . |
$$ . . . 0 8 3 . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . , . . . . . X . . . |
$$ . . . . . . . . . . . |[/go]
Supppose black plays at b from Bill's post. Answering at 7 is a little eccentric if the outside is important, and may be a mistake. White 9 may also be a mistake - atari is potentially an improvement. Then black exchages a for b. This exchange is probably bad for black, but it's not completely clear. The move at c is now sente, so white will be keen to play here first.
So in the tewari, both players have potentially made a duff move (and white potentially has made 2). If the outside is important, my contention is that white's mistake is bigger than black's mistake, and so this may be playable for black.
Edited to add:
My move may be rubbish.
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[go]$$W Overlooked
$$ ----------------------+
$$ . . . . . . . . . . . |
$$ . . . . . 5 . . . . . |
$$ . . . . 4 1 2 . . . . |
$$ . X . 9 7 6 8 X . . . |
$$ . . . . . 3 . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . , . . . . . X . . . |
$$ . . . . . . . . . . . |[/go]
I overlooked white 9. wich seems pretty reasonable. Next:
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[go]$$Bm10 Overlooked
$$ ----------------------+
$$ . . . . . . . . . . . |
$$ . . 3 1 4 O . . . . . |
$$ . . . 2 X O X . . . . |
$$ . X . O O X X X . . . |
$$ . . . . . O . . . . . |
$$ . . . . . . . 5 . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . , . . . . . X . . . |
$$ . . . . . . . . . . . |[/go]
Black 10 is the best bet. If white 11, black can claim to attack everything. So:
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[go]$$Bm10
$$ ----------------------+
$$ . . . . . . . . . . . |
$$ . . 2 1 3 O 5 . . . . |
$$ . 6 . 4 X O X . . . . |
$$ . X . O O X X X . . . |
$$ . . . . . O . . . . . |
$$ . . . . . . . 7 . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . , . . . . . X . . . |
$$ . . . . . . . . . . . |[/go]
White 11 is better. The black stone on the star point is wasted, so it's likely good for white. So black may choose this:
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[go]$$Bm10
$$ ----------------------+
$$ . . 7 . . . . . . . . |
$$ . 5 2 1 6 O d . . . . |
$$ . . 3 4 X O X . . . . |
$$ . X . O O X X X . . . |
$$ . . . . . O . . . . . |
$$ . . . a b . . c . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . . . . . . . . . . . |
$$ . , . . . . . X . . . |
$$ . . . . . . . . . . . |[/go]
White's next move is difficult, with many possible choices. I suspect it's OK for white - the group should get away quite easliy.