Nard Revealed at Ghanooj

From E2.2, Bozorgmehr Answers Chess with Nard. It illustrates E2.2.65–73:

E2.2.65
Upon the ninth day Bozorgmehr drew near,His face intent, his purpose firm and clear.
E2.2.66
He said, “The Shah gave me no leave to stay,Nor should I burden him with long delay.”
E2.2.67
The learned nobles then withdrew aside,And owned their ignorance without their pride.
E2.2.68
When Bozorgmehr had heard, he took his place,While all the sages watched with solemn face.
E2.2.69
He set the board of nard before their eyes,And showed the movements hidden from the wise.
E2.2.70
He showed the leader and his warlike train,The royal power and order of campaign.
E2.2.71
He showed how pieces moved, how battles grew,And brought the hidden rules to open view.
E2.2.72
The Raja and his counselors were amazed,The whole assembly wondering as they gazed.
E2.2.73
At Bozorgmehr the chiefs all cried acclaim,And hailed him holy sage of learned fame.