The "Showdown in Saint Louis", hosted by the Chess Club and Scholastic Center of Saint Louis, is a battle of different time controls / formats between invited players. Every year, since 2015, it changes a little every year, with the exeption of the tournament in 2016,one thing still stays the same the battle between the 2 same players in the whole tournament.
| Tournament (year) | Location | Battles | Formats |
|---|---|---|---|
| Champions Showdown 2019 | St. Louis | Hikaru Nakamura vs. Jan-Krzysztof Duda Fabiano Caruana vs. Pentala Harikrishna Wesley So vs. David Navara Leinier Dominguez vs. Veselin Topalov Sam Shankland vs. Richard Rapport | >12 Rapid games 15m+10s incr. 24 Blitz games 3m + 2s incr. |
| Champions Showdown 2018 | St. Louis | Garry Kasparov vs Veselin Topalov Hikaru Nakamura vs Peter Svidler Wesley So vs Anish Giri Sam Shankland vs Maxime Vachier-Lagrave Levon Aronian vs Leinier Dominguez | 6 Fischer Random Rapid games 30m + 10s delay 14 Fischer Random Blitz games 5m + 5s delay |
| Champions Showdown 2017 | St. Louis | Hikaru Nakamura vs Veselin Topalov Fabiano Caruana vs Alexander Grischuk Wesley So vs Leinier Dominguez Magnus Carlsen vs Ding Liren | 4 Rapid games 30m 6 Rapid games 20m 8 Rapid games 10m 12 Blitz games 5m |
| Champions Showdown 2016 | St. Louis | Viswanathan Anand | 6 Standard games 60m + 5s delay 6 Rapid games 15m + 3s delay 12 Blitz games 3m + 2s delay |
| Champions Showdown 2015 | St. Louis | Hikaru Nakamura vs Fabiano Caruana Hou Yifan vs Parimarjan Negi | 1 Basque (2 games at the same time) round 90m + 30s incr. 4 Fischer games Random 20m + 10s incr. 4 Rapid games 15m + 10s incr. 8 Blitz games 3m + 2s incr. |
