Buitenland/Hoshi Joseki

One-space Low Pincer  

w11 is played at a

Two-space Low Pincer  

Special-purpose pincer not ordinarily found in modern professional play.
White's ordinary answers are at a, b and c. The jump out at j, standard in old Chinese games, is sometimes seen.

Diagonal Attachment, with pincering stone  

Most of the time, it is assumed that when the diagonal attachment of is played, then there should be a pincering Black stone at or in the vicinity to prevent White from getting a base.

Diagonal Attachment, one-space jump (without pincer)  

When there is no Black pincer stone at or around a, then the diagonal attachment at is usually a bad idea. The goal of the attachment is to induce white to add a stone at , thereby making and heavy. However, without a pre-existing black pincer, white has sente to play (or a), an ideal extension, and black has thereby made white strong, rather than heavy. Additionally, the black corner is not secure territory, so Black has suffered a loss. See also section (ii) of joseki as a source of bad habits.

Diagonal Attachment, pincer (without one-space jump)  

In the 4-4 point diagonal attachment, one-space jump (without pincer) page, it was mentioned that is usually not a good move. In this page, we discuss the case when is played at a pincer (at or around ) instead.

Note that this sequence by itself is usually a mistake and hence it is not a joseki. However, like many concepts in Go, there are exceptions which make this playable.

One may want to compare and contrast this sequence with the 4-4 point diagonal attachment joseki.