4-4 point low approach low extension, slide, attach
Apparently, is a fairly recent Korean development from a dozen years ago.[1] It aims to develop a group on either side of the white kakari (develop on both sides).
Cho U played this way against Lee ChangHo on 2005-02-23 during Nongshim Cup,6,Korea,Nongshim -Jared
Bob McGuigan: There was an extensive analysis of this attachment in Go World issue number 87 as part of a series of articles on the Korean Style by Oya Koichi 8p.
[1]
Bill: Actually, it has been around for a while. It appears, with variations, in Suzuki and Kitani's Small Joseki Dictionary, published in 1965.
John F. It goes back to 1934 in Japan in the GoGoD database. But then it did not reappear in games we have, except in some instances with more stones round about, until 1991 when it re-emerged in Korea. Mark Hall collected a lot of these games and dubbed the opening the Korean Joseki. We have over 200 examples, and it's still being played widely.
This page should be merged with 44PointLowApproachLowExtensionSlideOutsideAttachment
I think this present page is a more polished and erudite discussion of this joseki and that the other page might mostly be made into a discussion page since it mainly consists of analysis by amateurs and examples from amateur games.