This class is about a specific plan, not about scheming in general. It says what Zhuge Liang, looking at how the powers were distributed, put to Liu Bei: where to take hold, with whom to ally and whom to oppose.
In 207, the twelfth year of Jian'an, Zhuge Liang put to Liu Bei at Longzhong a plan to hold Jing and Yi provinces, ally with Wu against Cao Cao, and divide the realm in three.
In 219 Guan Yu lost Jing Province. The plan had counted on a northern offensive in two prongs from Jing and Yi, and with Jing lost that premise was gone.
Though the premise was gone, Zhuge Liang still took the plan as his groundwork and led the Northern Expeditions, until he died at Wuzhang Plains in 234.
The Longzhong Plan is the class in the chapter on Strategies on one particular plan. It covers the scheme Zhuge Liang put to Liu Bei at Longzhong in 207, the twelfth year of Jian'an, to hold Jing and Yi provinces, ally with Wu against Cao Cao and divide the realm in three: in 219 Jing Province was lost and the premise of the plan collapsed, yet Zhuge Liang kept it as the groundwork of his northern campaigns until he died in 234.
