It is known for White to play tenuki here, after the pincer . This example is of interest in relation with the discussion at quasi-pincer.
Black's known plays next here are at a, which was seen often in the 1930s; at b (which White may ignore again, as in a game O Rissei-Hane Yasumasa (B) 2001-05-10), or at c (played by Goto Shungo).
This is the most common (widest path) development: now White possibly plays tenuki once more.
The interest here is that this seems to connect with the Go Seigen 'twenty-first century' ideas. By transposition, this sort of local sequence is considered:
The latter occurred in Rui Naiwei-Yi Ch'ang-ho (B) 2000-09-08.
So, a tentative connection is established between three ideas: