adjust the game speed to the slowest possible. immediately evacuate all mobile forces from the south base to a safe location. have the south east hatchery hatch a drone. evacuate all mobile forces from the north base to a safe location. have the north east hatchery hatch a drone. move the drones to a safe location. start upgrades and mining at the main base. you should have salvaged enough forces to take back the south east base. with your drone build a hatchery. use the overlords to detect lurkers. you shouldn't have any problem establishing a south east base. you can't use the same strategy to the north because the ultralisks will take you out, and there's nothing you can do about it. you have to wait to build a queen spire and upgrade. once you have the ability to spawn broodling the ultralisks, and have a few queens, you can take the north east base. you now have staging areas to attack the south and north base, along with plenty of resources. once you take the south and the north base, the game is pretty much over. build guardians and protect them with scourge and hydralisks. two scourge will take out a overlord or guardian, three scourge will take out a devourer. build zergling and set a rally point near the front. you'll have plenty of resources to take out all enemy forces. increase the game speed so you're not waiting all day on the guardians.