aLegendWai: I am going to show all possible attempts to cut. If you are unsure why Keima watari can ensure the connection. It is worth reading on. I will show both the correct and wrong responses. So weaker players can avoid the wrong ones.
The purpose of is to try to block B's connection by a ladder. However there's another sure-fire way to ensure the connection.
Note: W cannot capture by a net. It is because
cannot played at "a".
Attempt to cut 3 - a clamp is no use