Side Joseki
Although the term joseki is usually used to refer to standard sequences in the corner, it can actually be used to refer to any standard sequence, and go literature will refer to certain sequences as middle game joseki. One class of such joseki are those that occur on the side.
Here is an example of a side joseki. White plays the shoulder hit . Black first pushes up with
, then slides under with
.
Shoulder hit joseki
, diagonally approaching a stone on the third line, is know as a shoulder hit. Black has several options for dealing with this move, the most important of which are a and b. Playing elsewhere is generally a bad idea in this situation.
Capping play joseki
, approaching a stone on the third line from above, is know as a capping play. Common responses include a and b. Ignoring this move is less serious for black than ignoring a shoulder hit.
There are other capping plays at the circled points. (See 1, 2, 3)
Approach joseki
There are standard sequences on the side when invading a position, see Three Space Extension Invasions