In this coaching session Machine goes over what he considers the three main Zerg vs. Zerg openers: the 15 Hatchery fast-expand, the 14-gas 14-Spawning Pool Speedling/Baneling build, and a Roach build for small maps. Machine explains how each build is dependent both on the map and information you gain from scouting your opponent.
In this coaching session LiquidRet goes over a 15-Hatch Roach build that is strong enough to handle Ling/Bling openings, along with other Speedling openings. This build emphasizes a strong economic base, with an emphasis on being the defender to obtain chances to safely add drones that the attacker cannot to gain little advantages that grow as the match gains length.
In this coaching session Bitter goes over the essentials of the Roach/Hydra build designed to control Protoss 6-Gate pressure. Bitter follows the guidelines from the Machine Roach/Hydra ZvP coaching session.