that is his build order...
another one is 9 drones... build extactor, build another drone, cancel extractor, wait till 200 build spawning pool, as soon as you have 50 min build the extractor agin, then wait till 100 min build ovy, once extractor is done send 3 drones to it, then when spawing pool hatches you should have enough for lair, morph it inot a lair, build hydra den, then wait for liar (while building 4 hydras or so....) when lair comes up upgrade lurk evolution on the den... then lurk rush... it seems long here.. but trust me, when done properly it works well...