Natural Gate Rush

Using this build, your early economy falls a lot behind on the enemy. When you place down your Nexus, you're already like 10 workers behind. If I were to play against you, and notice that you expand with only one Gateway, I'd simply 4-gate rush and you'd be done for. Actually, even 2-gate Robo push would deal with this build. If your enemy doesn't scout, however, this eco-cheese would work really well. Still, I wouldn't suggest using this.

I'd like to add that in ONE minute (in early game, with low saturation, ~10 worker count) a worker mines 150 minerals. It falls down as more workers are produced, but the total amount of minerals that you gain rise a lot. Even if you're getting second base really early, it'd be much more beneficial to have only one base (with this build of course).

I used a similar build in an unranked game and it worked quite ok. The key is the non scouting opponent, and follow up with stalkers or whatever you want. expand when it is safe to do, and the some damage has been done. wouldn't use it in ranked matches though.