This is episode 75 of 87 of Little Go Master, Big Moves. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The closing stretch of the season, where the arc pays off.
Hermit Qingyan brings his disciple Tangbao to Master Su Yu's chess club. Tangbao shocks everyone by solving the twenty-year-old 'True Dragon Chess' puzzle and defeats chess king Ye Xiao. Su Yu then reveals his obsession with the secrets of his late wife, beginning their legendary journey together.