Having trouble with battlecruiser openings? Tired of getting your third blocked? Look no further cause this is the guide for you:
16 hatch
18 gas
17 pool
20 overlord
@100% spawning pool: 2 queens, 4 lings
@100 gas: ling speed, take 1 drone off gas
@100% queens: double inject and position in natural to spread creep, 2 more queens
36/36: 2 overlords
@100% queens: lair, baneling nest, take third base (or earlier if you can), put drone back in gas, 2nd gas
52/52: 3rd and 4th gas, 2 overlords
@100% lair: spire, baneling speed, overseer scout
Saturate your third, prioritize the gases. When your spire is done your should have 8-10 mutas starting.
Credit to Elazer who I stole this from.
Have fun.