In Starcraft 2, if you play as Zerg, focus on making a Nydrus network, and fill it with speedlings with your overlord positioned at the enemy's base side as early as possible, you place your Nydrus work near the mineral line, then release your speedlings upon the workers and then everything else, you win the game. However, I did found some difficulties. Please tell me if you ever known about this strategy and if it is really effective?