Keima's connect-power is weaker than one-point jump's.
And black1 and white2 are peeps of it's vital points.
The connection for peep to a one-point jump is a good shape.
But the connection for peep to a keima cann't obtain a good shape easily.
Black1 aims at a cutting to keima.
White(E14) defending large knight's move enclosure is a good shape.
But when the white group surrounding black group became strong, white2 becomes a vital point.
[right upper moves] Even if white4 and 6 that strengthens the black group were moved, white group can't have it's grounds.
[left upper moves]
Hereafter, to 48, it's phase becomes advantageous to White with ko.
This figure is an actual combat score of Takemiya 9 dan (black) and Cho 9 dan (white).|
Against the black attacking, white took a move of white1 that is a vital point of black keima.
Even on your shinogi you can take a effective move attacking his vital point and weak point.
It is a joseki of black1 keima (cap).|
White2-10 are under black's moves. But white12 is a vital point of black keima, therefore it is even.