Editing Chess960 (section)

===Saint Louis Chess Club's Champions Showdown: Chess 9LX===
2018 – From September 11 to 14, 2018, the [[Saint Louis Chess Club]] held a Chess960 event,<ref>{{Cite web |url=https://www.uschesschamps.com/2018-champions-showdown/2018-champions-showdown-chess-960 |title=Champions Showdown Chess 960 |access-date=18 September 2018 }}</ref> but they did not yet call their event 'Chess 9LX'. (They started next year.) The playing format consisted of individual matches, each pair of players facing the same five different starting positions, with 6 rapid games (counting 2 points each) and 14 blitz games (counting 1 point each). ''Players and scores:''<ref>{{Cite web |url=https://www.uschesschamps.com/2018-champions-showdown/results |title=2018 Champions Showdown Results |access-date=18 September 2018}}</ref>

# [[Veselin Topalov]] (14½–11½) defeated [[Garry Kasparov]].
# [[Hikaru Nakamura]] (14–12) defeated [[Peter Svidler]].
# [[Wesley So]] (14½–11½) defeated [[Anish Giri]].
# [[Maxime Vachier-Lagrave]] (17½–8½) defeated [[Sam Shankland]].
# [[Levon Aronian]] (17½–8½) defeated [[Leinier Domínguez]].

2019 – The playing format once again consisted of individual matches. ''Players and scores:''<ref>{{Cite web |url=https://uschesschamps.com/2019-champions-showdown-chess-9LX/overview |title=2019 Champions Showdown Results |access-date=24 September 2022}}</ref>

# [[Fabiano Caruana]] (19–7) defeated [[Garry Kasparov]].
# [[Wesley So]] (18–8) defeated [[Veselin Topalov]].
# [[Peter Svidler]] (15½–10½) defeated [[Leinier Domínguez Pérez]].
# [[Hikaru Nakamura]] (14½–11½) defeated [[Levon Aronian]].

2020 – The playing format changed to a round robin. The event was won by both (There was no tiebreaker) former world (standard) chess champion [[Magnus Carlsen]] and [[Hikaru Nakamura]]. Magnus Carlsen and Hikaru Nakamura got 6/9. Fabiano Caruana and Levon Aronian got 5½/9. Wesley So scored 5/9, Maxime Vachier-Lagrave and Leinier Dominguez Perez got 4/9. Garry Kasparov scored 3½/9, Peter Svidler 3/9 and  Alireza Firouzja 2½/9.<ref>{{Cite web |url=https://uschesschamps.com/2020-champions-showdown-chess-9LX/overview |title=2020 Champions Showdown Results |access-date=24 September 2022 }}</ref>

2021 – The playing format was a round robin with 10 players. The event was won by [[Leinier Domínguez Pérez]].<ref>{{Cite web |url=https://www.uschesschamps.com/2021-champions-showdown-chess-9lx/pairings-regulations |title=2021 Champions Showdown Pairings & Results |access-date=24 September 2022}}</ref>

2022 – The playing format was a round robin with 10 players. The event was won by [[Fabiano Caruana]] who defeated [[Alireza Firouzja]] in armageddon.<ref>{{Cite web |url=https://uschesschamps.com/2022-champions-showdown-chess-9lx/pairings-results |title=2022 Champions Showdown Pairings & Results |access-date=24 September 2022}}</ref>

2023 – The playing format was a round robin with 10 players. Sam Sevian won with 7/9. Wesley So, Levon Aronian and Sam Shankland got 6/9. Fabiano Caruana scored 5½/9, Hikaru Nakamura 4/9, Jeffrey Xiong 3½/9, Garry Kasparov 3/9, Leinier Dominguez 2½/9 and Ray Robson 1½/9.<ref>[https://uschesschamps.com/2023-champions-showdown-chess-9lx/pairings-results uschesschamps.com 2023 Champions Showdown chess results]</ref>

2024 – The playing format was a round robin with 10 players. The event was won by Fabiano Caruana.<ref>{{Cite web  |url=https://uschesschamps.com/pgn/2024Chess9LX/SMWSite/index.html |title=2024 Champions Showdown Pairings & Results |access-date=12 January 2025}}</ref>