jhubert: Sadaharu:
After E19F18A18A17, playing the wedge at D18 first should work too.
jhubert:
D17 is said bad because of C19 but in this case A19 kills everything. So B18 as defense is not good.
d4rkm4tter: The wedge at D18 should be the only correct move. C17 results in capturing a part but give life in the corner. After D18, white should answer D17 and it is a ko. ..D18-D17-C17-D19 still a ko.
Sadaharu: After E19 F18 A18 A17, playing the wedge at D18 first should work too. jhubert: D17 is said bad because of C19 but in this case A19 kills everything. So B18 as defense is not good.