shai: Katago prefers C2. C2,E2 and B2 are all very close.
caranthir: Yes, Katago appreciates the fact that e.g. C18 doesn't allow for possible forcing moves for the opponent on the outside later on. (Also importantly, opponent making shape with E18 is gote.) This is a pattern that I see elsewhere too, looking at real games. I added C18.
Katago prefers C2. C2,E2 and B2 are all very close.