Yi Hwang
In the fifteenth century, the Joseon dynasty revived the game at court, promulgating it as a creation of Confucianism. It was defended from criticism by King Jungjong in 1518, who reaffirmed its respectability and its Confucian connotations. Popularity at court enabled the game to spread through the scholarly and lay community, although the Sarim scholars of the Late Joseon period dismissed it as frivolous. Despite this tuho was a favourite pastime of the scholar Yi Hwang, who recommended it to his students as a way to develop physical health and mental focus. Tuho was featured (along with Yi Hwang) on the 1000 won note from 1983-2002, but was left off of the newest version of the 1000 won note which was first issued January 22, 2007. It was also recommended by Jeong Yak-yong, in his "Mongmin Simseo" ("Admonitions on Governing the People").