3-4 point low approach three-space low pincer
This pincer has a very distinguished history, from Dosaku onwards, and is still very much in use today.
wild guess - strong player please fix this: This pincer is typically used as a pseudo wedge? when black wants to prevent white from establishing a moyo on the top. is useful because a more narrow pincer at a or b would be easier for white to counter pincer on the right, however,
exerts less pressure on
.
in the low position (vs
at c) is used to make it less easy for white to seek immediate life by sliding under with
, and easier for black to make a viable group on the top, but doesn't have the influence that a high pincer at c would.
Other replies frequently seen are d to h, and i as part of an overall plan. White e tries to avoid the counter-atari line after White f, but can lead to complex variations when Black answers at f.
e is discussed in some detail in the first chapter of The World of Chinese Go by Guo Juan.
White's slide to s was fashionable for a while in the 1980s.