![[Diagram]](../../diagrams/35/47ddbbbb1e18776e3ce078c78850e43c.png)
19x19 diagram
![[Diagram]](../../diagrams/42/309b596676b9b4281f666d66c301c7e6.png)
19x19 diagram
![[Diagram]](../../diagrams/21/2630b7079d05adabceae78b91dd7a685.png)
19x19 diagram
![[Diagram]](../../diagrams/26/602f0a69c1b391962ac121e2e8e05222.png)
At least ko I
![[Diagram]](../../diagrams/15/8ed473028ec0cb6a18250236ab391fef.png)
At least ko II
![[Diagram]](../../diagrams/6/edb00f622a350d121500f6a9e96eb7b3.png)
star point approach far high pincer
![[Diagram]](../../diagrams/23/decb02960c971d084f649975ad773c07.png)
star point approach far high pincer
![[Diagram]](../../diagrams/44/f233bbdc3d98a2f4e37a3d649c58c51c.png)
Giving away the original invasion stone
![[Diagram]](../../diagrams/5/172746fff6d55fdbdfca54d320880f8c.png)
Why is this bad for Black?
![[Diagram]](../../diagrams/9/4ae4415b3b66d60e0e2db50a0499e868.png)
Why is this bad for Black? II
at a depends on a ladder, any white move around b is sente now against the corner (black needs to sacrifice a stone with the cut to gain an approach liberty. I.e. the white group is not weak.