4-4 point low approach three-space high pincer
White's most frequent reply is the low double kakari here.
White's other common replies are a, tenuki, and three other kinds of double kakari:
- The high approach at b;
- The distant high approach at c;
- And the distant low approach at d.
The latter two c, d are more often seen in 4-, 5- or 6-stone handicap games, where White wants to approach the next handicap hoshi stone in the lower left after Black re-acted in this corner.
Because c, d are further down from the top left hoshi, they are more connected to that extension to follow.