偷襲烏巢 (Raid on Wuchao)

Raid on Wuchao is a point-to-point board-wargame. In 200 AD, during the late Eastern Han Dynasty, the Hebei warlord Yuan Shao and the Henan warlord Cao Cao confronted at Guandu. Short of food supplies, Cao Cao, following Xu You's advice, launched a surprise attack on Wuchao, Yuan Shao's granary. The attack was successful, forcing Yuan Shao to retreat. Cao Cao later defeated Yuan Shao and unified northern China. Raid on Wuchao allows history to repeat itself. If you were Cao Cao, would the attack have been successful? If you were Yuan Shao, would you have stopped the attack?