3-4 point high approach outside contact, tsukehiki solid connection
Recently, the solid connection at is coming up as an alternative for the hanging connection at a. The idea is, that after White's attachment at b, Black's defense at c is impossible. Thus, White is more or less guaranteed the option of playing either at b or d.
Because the corner is quite large, is a common move. White concludes a simple joseki with , but she can also play tenuki. As of Jan 2003, up to is very fashionable in pro games.