Three noted episodes in the Three Kingdoms

Stone Sentinel Maze

In Chapter 84, as Lu Xun pursued the fleeing Liu Bei after the Battle of Yiling, he felt a strong enemy presence near Baidicheng and cautioned his army for possible ambush. He sent scouts ahead, who reported that the area was empty except for some scattered piles of stones. Bewildered, he asked one of the locals, who answered that Qi started to emerge from the area after Zhuge Liang had arranged the stones there. Lu Xun personally inspected the area and determined that the array was only a petty display of deception. He led a few cavaliers into the array. Just as he was about to come out, a strong gust of wind blew. Dust-storms shadowed the sky and the stones became swords, mountainous piles of dirt emerged while the waves of the Yangtze River sounded like swords and drums. Lu Xun exclaimed, "I have fallen into Zhuge's trap!" and attempted to exit to no avail.

Suddenly, Lu Xun saw an old man standing before him, who asked him if he needed assistance in getting out of the array. Lu Xun followed the man and exited the maze unharmed. The old man identified himself as Zhuge Liang's father-in-law Huang Chengyan. Huang explained that the array is constructed using the ideas of the Bagua. Huang Chengyan said that Zhuge Liang had predicted that a Wu general would chance upon this maze when he first constructed the structure. Zhuge asked Huang Chengyan not to lead the general out when that happens. Lu Xun immediately dismounted from his horse and thanked Huang Chengyan. When he returned to his camp, he exclaimed that he could never beat Zhuge Liang in intelligence.