His biggest claim-to-fame is that he invented the game of Go (Wei Qi). It was during his reign that several disasters happened. First there was the problem of the Ten Suns (see DI-JUN).
On top of that, the Yellow River burst its banks and caused a Great Flood. (Was this anything to do with GONG-GONG? We don’t know.) But YAO instructed his officer GUN to deal with the problem. Which was somewhat unfair as he was still mopping up when SHUN came to the throne.