FIDE Master (2010); International Master (2014); Grandmaster (2015); World Junior Champion (2016).

Xiong became a FIDE master after winning the World U10 Championship held in Halkidiki in Greece in 2010. He was the runner-up to Jason Cao in the World Youth Championship (2012) U12 category. He won his IM norms at the 4th Annual Golden State Open in January 2013, the 2013 UT Dallas Spring FIDE Open sponsored by Turner Construction in March 2013 and at the 7th Annual Philadelphia Open a couple of weeks later. He reached the requisite 2400 rating on 22 March 2014 when he beat Darwin Yang in round 4 of the 2014 DCC FIDE Open II, which he won with 5/5.

In September 2014, he placed =1st at the 2014 Dallas Open alongside Alejandro Ramirez Alvarez and Milos M Pavlovic. In November he placed =3rd with 6/9 at the 2014 UT Dallas Fall FIDE Open.

In May 2015, Xiong won the Chicago Open ahead of 24 grandmasters, and achieved his final GM norm. This makes him the 17th youngest person in history to qualify for the GM title. In July 2015, he won the 7th St Louis GM Invitational. He achieved an even score (+1 =9 -1) in the US Chess Championship (2016). He scored 6½/9 at both the 2016 USA Junior closed championship(1) and the Capablanca Memorial (Premier) (2016) to win those events.

In August 2016, he became the youngest player since Joel Lautier to win the World Junior Championship (World Junior Championship (2016)), doing so with a round to spare. He tied for share of 2nd-6th in 2017 at the World open(2).

He won the World Junior Chess Championship, held in Bhubaneswar, India with a round to spare. He finished with an undefeated 10.5/13, a point ahead of Vladislav Artemiev.

In March 2018, Xiong won the St. Louis Spring Classic A group, a round-robin tournament of category XVII, with an unbeaten score of 6.5 points (4 wins, 5 draws) out of 9, 1.5 points clear of the field. His performance rating was 2819. One year later, he won again with an unbeaten 6/9 score (3 wins, 6 draws), half point clear of second-placed Illia Nyzhnyk.

In September 2019, Xiong participated in the FIDE World Cup. Seeded 31st in the tournament, he made it to the quarterfinals by beating Igor Lysyj, Parham Maghsoodloo, Anish Giri, and Jan-Krzysztof Duda. Xiong was then eliminated by the eventual winner, Teimour Radjabov

In October 2020, Xiong placed second (behind Wesley So) in the US chess championship, and also second (behind John Burke) in the US junior championship. USCL player card: http://uschessleague.com/player.php...

References / Sources:

(1) http://www.uschesschamps.com/2016-u..., (2) http://chessevents.com/2017/07/worl..., (3) Wikipedia article: Jeffery Xiong