In the fall of 2008 Zerg players adopted a three-base five-Hatchery strategy against Protoss and nearly all attempts to counter it failed. Protoss players had particular difficulty using Zealots against Hydralisks in a choke battle as the Zealots could not spread out effectively, while Hydralisks could clump easily, not allowing Zealots to take advantage of their speed upgrade. Bisu managed to successfully use speed-upgraded Zealots to obtain map control and engage the Hydralisks before they reach mass numbers. While other professional Protoss players have around a 60% win ratio against Zerg, Bisu's ratio against that race reached over 90% in the 2010–2011 competition season. During the 2010–2011 Shinhan Bank Proleague Bisu also achieved the largest number of wins. In the past, however, Bisu was not particularly favored against any good Zerg player. On April 2, 2011 Bisu, having defeated Jaedong in the Shinhan Winners League playoff, broke what he called "a vicious cycle" of his Protoss versus Zerg gameplay. He once revealed, that only after learning the skill of combining different units (i.e. ground, air, high templars, reavers) he began to enjoy playing against Zerg.