3563 enclosure
Keywords: Opening
Occurs in What Grade Is This Fuseki / Otake's Answer.
In this case the relationship between the stones in the enclosure is not good shape.
White can play as shown here. This breaks the direct relationship between the black stones. Black may have to give up points in the corner, and instead attack White's group.
In a game O Meien-Takagi Shoichi in 2001, this happened, with White giving back the corner in return for good shape on the outside (White a next).