Djab: An intersting combination that could be added starting with White at O3 and Black trying an answer at N3 :
O3 - N3 - O2 - O1 - P1 - N1 - Q2 - P3 - P2
posetcay: I think the main variation is more interesting but I agree that black O1 makes your variation interesting enough to be added.
Sadaharu: After N3P3O3O2, if you play at N1 can't black play at R2? I thought the correct answer should be P1R2Q1
posetcay: Yes, I missed that R2 gains an extra liberty in sente if black plays N1 or O1, that makes P1 the only correct move then, but Q1 is the wrong follow-up, black should cut at P2 instead.
Q1 also works no? In your variation black doesn’t have enough liberties if you continue