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I have question that has been bugging me since the beginning of time (1v1 SC2 time that is).

What are good followups to a 6 pool by a zerg in PvZ?

Ok before you say anything, there are a few scenarios :

Case 1
FFE : Small chokes e.g. Neo Planet S (or any map that can be walled off easily to protect natural)
This I consider generally fine because you can easily block it off.

Case 2
FFE : Wide impossible to wall chokes e.g. Akilon Wastes
So if I manage to get a cannon or 2 to protect my nexus... what to do next?
If I 1 base pressure into expand later, he might be prepared (if he isn't I win but that's rarely the case unless he's bad; then it either goes one sided after OR a long game with me feeling frustrated that I cant do as much)
Bearing in mind, he probs want to 1 base roaches into expand or expand into roaches, turtling, most probably getting mutas some time or banes to kill my poor probes etc etc

Case 3
Gate Expand : Why because he was random and turns out to be Zerg (How I hate when this happens)
Same as before if I counter, he might be prepared. I know it hurts his eco to make units but I cant break and again, it might turn out to be one sided OR a long game that frustrates me esp when I am likely to lose (base trade or no base trade). OR he might go banes and try to kill my poor probes.

Thanks.