This door panel shows Sinxay and Sangthong fighting Nak Valoonarat, the king of the naks who has married his cousin, Sidachan, daughter of Soumountha. Sinxay won three games of chess against Nak Valoonarat, betting his weapons against Nak Valoonarat's kingdom. After winning three games in a row Sinxay said he would settle for taking his wife, Sidachan, which infuriated Nak Valoonarat who demanded all his nam followers go into battle with him against Sinxay. Eventually Sinxay decided he needed to ask Phanya Kout to bring his followers to fight the naks because as reptiles Sinxay thought it was beneath his dignity to be fighting them. There are beautiful illustrations of this inside the sim at Wat Chaisi.