Market challengers have several options when attacking market leaders including encirclement attacks against the entire market leader, bypass attacks by entering new geographic markets or product categories not defended by the leader, or guerrilla attacks involving intermittent price cuts and promotions. The document provides strategies for market challengers to consider when deciding whom and how to attack based on their available resources, with bypass attacks and identifying shifts to fill gaps suggested as approaches for challengers with fewer resources than frontal assaults on market leaders.