Is 12 hatch really higher econ? I imagine that if you focus on drones first you could get better econ.
Also isn't 10 hatch (extractor trick) safer then 9 hatch (if not taking expo) in that you should be able to get your pool up faster. Canceling drone only costs like 12 minerals and the fact that you will have 10 mining before hatch is up should get you a faster pool, right?
Basically, I'm hoping to apply this to 2v2 (or 3v3 hunters hehe), with the option of getting faster sunken or mass lings.
To make it more visible. Here is some research I did:
10 hatch (extractor trick twice, before hatch and after pool, before overlord)
Pool comes up at 2:36
at 2:50 mark 246 minerals and 15 drones.
Pool comes up at 2:51
at 2:51 mark: 15 drones 392 minerals. Note: the drone advantage is going to disappear since, the hatchery is not yet up and running.
Pool comes up at 2:37.
at 2:50 mark: 15 drones 192 minerals.
10hatch vs 9 hatch.
Same time pool but slightly more minerals.
10 hatch vs 12 hatch. You are behind over 100 minerals, but your larvae count will soon overcome 12 hatch's. Also you have a decently faster pool which can make a big difference in such a late-pool build.
Summary, seems like 10 hatch should almost always be better then 9 hatch. 12 hatch is of course the better build in high level 1v1, but for low level play 10 hatch imo is unconventional and still strong. I think its probably much more useful in 2v2, 3v3 for its flexibility.