[Satu]

I just tried this vs a silver league zerg, and it resulted in the most one-sided ZvZ I've ever done. I didnt read this build anywhere, I just made it up on the spot after deciding I wanted upgraded speedlings. Strangely enough, I got the timing correct so that the upgrades coincided with each other. My opponent went for non-upgraded speedling roach with a quick expand. He got decimated.

The idea is to make speedlings which gain the +1 attack upgrade at the same time as the movement speed upgrade. This causes any speedlings to be much weaker and the only two feasible options for the opponent are mass banelings or +1 speed roaches. But with correct micro, both shouldnt be huge problems and should leave you with map control. Any other ground unit combination gets killed off easily.

Build order:
9 overlord
12 extractor
14 spawning pool
@ spawning pool 50% make evolution chamber
@ evolution chamber 100% research melee attack 1
14 drone
@ 100 gas research metabolic boost

After this, 15 two spines
OR
15 queen
depending on opponent's aggression early on. The spines will defend you better but the queen will cause more +1 speedlings to come sooner and be more effective.

If they have put up a quick hatch: Make speedlings and go ******* kill him.
If they made a lot of lings: Make speedlings and go ******* kill him.
If they made a few roaches: Make speedlings and go ******* kill him.
If they put up a heap of spines: Depends how many spines, just have the judgement to see when its a lost cause and that its safer to just drone up.

Avoid choke points and micro around while you take your own expansion and drone up. Get a lair and second gas up after your expansion and tech up to mutas.

Pros:
- Takes down most non-upgraded ground unit builds.
- Very good build vs early expansions, as the zerglings should arrive at their base while they have minimal defence.
- Allows for very safe expansion building time
- Causes zerglings to be much more cost-efficient early on, which adds up after every battle.

Cons:
- 6pooling is easier vs this build due to the very early gas
- There is a small period of time where you will be waiting for spines to come up in order to have some defence. If you know you have less time, zerglings may be a better option, although its preferable to spend the larvae on drones/spines.
- Banelings can weaken your army considerably if you do not micro correctly or push at the correct times.

Discuss the pros and cons of this build and even compare to other builds if you wish. I think its a pretty darn good build for ZvZ. I can post a replay of me winning with this sometime as well.

Replay: http://www.sc2sea.com/downloads.php?do=file&id=145