Hans Moke Niemann (born June 20, 2003) is an American chess grandmaster and Twitch streamer. He first entered the top 100 junior players list on March 1, 2019, and became a FIDE grandmaster on January 22, 2021. In July 2021, he won the World Open chess tournament in Philadelphia. He had a peak global ranking of No. 16 in September 2024. In September 2022, Niemann became embroiled in a controversy after defeating reigning World Chess Champion Magnus Carlsen in the third round of the 2022 Sinquefield Cup.
https://en.wikipedia.org/wiki/Hans_Niemann