3-4 point high approach outside contact sansan
tderz: Black has now at least the choices 'a' and 'b'. 'b' is covered here somewhere on Senseis, I do not want to duplicated it too much.
... this exchange Wa-Bb-c-d can be expected: White can attack here, as there is only one eye in the corner
After , Black has four main variations.
Black a is standard. Black takes influence towards the upper side. This is typically a joseki that is to be learned - not many variations, but the main line has some tesuji that is hard to find while at the board. See 3-4 point high approach, double contact hane.
Black b is a simple variation, which is good if the left side is more important than the upper side. See 3-4 point high approach, double contact, wall.
After and
, Black can choose between Black c, a horrendously complex variation in which the above-mentioned ladder surfaces, see 3-4 point high approach, double contact, cut, and Black d, which is like Black a in being directed towards influence and like Black b in putting emphasis on the left side, see 3-4 point high approach, double contact, extension. There is also a variation that is being played recently, atari at a: 3-4 point high approach, double contact, atari.
Jared: How do you guys like this one?
Black Lee Changho, 9p
White Cho U, 9p
Komi 7.5
Date 2005-06-15