Sinquefield Cup: History, Format & Champions

The Sinquefield Cup is chess's strongest annual super-tournament, held in Saint Louis as a leg of the Grand Chess Tour. Here's how it works, its history, the 2025 winner Wesley So, and what's next in 2026.

The Sinquefield Cup is, edition for edition, the strongest annual chess tournament on the planet that isn’t a world title match. Held every year in Saint Louis, Missouri, at the home of the Saint Louis Chess Club, it gathers a handful of the world’s elite for a classical round-robin where every game is a heavyweight bout. Since 2015 it has been the marquee classical leg of the Grand Chess Tour. As of July 2026, the reigning champion is Wesley So, who won the 2025 edition in a nerve-shredding blitz playoff.

Quick facts

Organizer: Saint Louis Chess Club · part of the Grand Chess Tour (since 2015)

Format: elite invitation-only classical round-robin (small field, historically 4–12 players)

First held: 2013 · Frequency: annual · City: Saint Louis, USA

Reigning champion: Wesley So (won 2025) — as of July 2026

Next edition: 2026 — scheduled 8–21 August 2026 in Saint Louis

What is the Sinquefield Cup?

The Sinquefield Cup is an invitation-only super-tournament named after Rex Sinquefield and his wife Jeanne, the philanthropists behind the Saint Louis Chess Club. Rex Sinquefield launched it in 2013 as part of a mission to turn Saint Louis into the chess capital of the United States — and it worked. Within a couple of years the Cup had become the toughest closed event in the world, routinely fielding the reigning World Champion, the world number two, and a stack of top-ten grandmasters.

There’s no qualifying ladder: you get in by being invited, and invitations go to the elite — recent major-tournament winners, the top of the rating list, and (often) the previous year’s Sinquefield champion.

The Najdorf Sicilian tabiya — the fighting weapon of choice for Sinquefield winners like Caruana, Vachier-Lagrave and Firouzja.

How does the tournament work?

Round-robin: everyone plays everyone. There are no knockouts, no eliminations — just a small field grinding through a full cross-table. Recent editions have used a 10-player single round-robin (9 rounds).
Classical time control: long games, often five hours or more, where a single slip can decide the standings. A win is worth 1 point, a draw ½.
Tiebreaks: if players finish level on points at the top, the title is settled by faster rapid and blitz playoff games. This has decided several editions, including 2019, 2022 and 2025.
Grand Chess Tour: since 2015 the Cup has been part of the Grand Chess Tour, a season-long series of elite events where players chase points toward an overall tour title and a shared prize fund.

A short history

2013: the inaugural four-player double round-robin, won by Magnus Carlsen — his last event before he became World Champion later that year.
2014: Fabiano Caruana produced one of the great tournament performances in history (more below).
2015: the field expanded and the Cup joined the Grand Chess Tour; Levon Aronian took the title in a line-up so strong its average rating was compared to the legendary AVRO 1938 tournament.
2016–2018: American and French stars traded the crown — Wesley So (2016), Maxime Vachier-Lagrave (2017), then a three-way tie shared by Carlsen, Caruana and Aronian in 2018.
2019–2021: Ding Liren edged Carlsen in a playoff (2019); the 2020 edition was cancelled amid the pandemic; Vachier-Lagrave won again in 2021.
2022–2025: Alireza Firouzja won a dramatic, headline-heavy 2022; Caruana took 2023; Firouzja won again in 2024; and Wesley So claimed his second title in 2025.

For the complete year-by-year list, see the Sinquefield Cup winners page.

The latest edition: 2025

The 2025 Sinquefield Cup (Saint Louis, 18–28 August 2025) came down to the wire. Three players — Wesley So, Fabiano Caruana and Praggnanandhaa Rameshbabu — finished tied for first on 5½/9, forcing a blitz playoff. Praggnanandhaa beat Caruana in the first game; So then beat Praggnanandhaa and drew Caruana to score 1½/2 in the tiebreak and lift the trophy. It was So’s second Sinquefield Cup (after 2016), with Praggnanandhaa second and Caruana third on tiebreak (as of July 2026).

What’s next: the 2026 edition

The 2026 Sinquefield Cup is scheduled for 8–21 August 2026 in Saint Louis, once again as the final classical leg of the Grand Chess Tour before the tour Finals. The full line-up and result aren’t in yet (as of July 2026) — check the winners page after the event for the updated champion.

Famous moments

2014 — Caruana’s dream run. In only his second appearance, Fabiano Caruana opened the six-player double round-robin by winning his first seven games in a row (7/7) — a start Aronian called a “historical achievement.” He finished on 8½/10, three full points clear of runner-up Carlsen (5½), with a performance rating around 3098, among the highest ever recorded in a single event.
2019 — Carlsen edged in a playoff. Carlsen and Ding Liren tied on 6½/11 in the classical event; Ding won the rapid-and-blitz tiebreak to take the title, becoming the first player in years to beat Carlsen in a playoff.
2022 — the year that made headlines beyond chess. Alireza Firouzja won the event (in a playoff over Ian Nepomniachtchi), but it’s best remembered as where the Carlsen–Niemann controversy began. We cover that neutrally below.

The 2022 Carlsen–Niemann controversy — the facts

This one deserves a careful, neutral summary, because a lot of what circulated online went well beyond what was ever established.

In round 3 (4 September 2022), Hans Niemann beat Magnus Carlsen with the black pieces. The next day, Carlsen withdrew from the tournament — a highly unusual move for the world’s top player — posting only a cryptic video clip rather than a direct statement. He did not formally accuse Niemann of cheating at the time; a later statement said he believed Niemann had “cheated more — and more recently — than he admits,” but stopped short of alleging cheating in that specific game.

Crucially, no evidence of cheating in that game or at that event was ever established. The tournament’s chief arbiter said there was “no indication that any player has been playing unfairly” during the Cup, and independent statistical analysis found no evidence of foul play in Niemann’s games. A widely reported Chess.com report (October 2022) concluded there was a “lack of concrete statistical evidence” that Niemann cheated in the game with Carlsen or in any over-the-board game, while alleging online violations in his past.

Niemann later filed a $100 million lawsuit against Carlsen, Chess.com and others; a US federal court dismissed the case in June 2023, and the parties reached a private settlement in August 2023 (terms undisclosed). As part of that resolution, Niemann was reinstated on Chess.com, and Carlsen acknowledged there was no determinative evidence that Niemann cheated in their game. Chess Lab Academy takes no side here — we’re just reporting what is on the public record (as of July 2026).

How to follow it

The Sinquefield Cup is broadcast live each August with expert commentary from the Saint Louis Chess Club and on Chess.com, YouTube and the Grand Chess Tour channels, complete with move-by-move analysis and engine evaluations. Because the games are classical, a single round can run all afternoon — perfect for settling in and following the tension move by move.

FAQ

What is the Sinquefield Cup? An elite invitation-only classical chess tournament held annually in Saint Louis, USA, since 2013 — widely regarded as the strongest non-championship event of the year and a leg of the Grand Chess Tour.

Who won the most recent Sinquefield Cup? Wesley So won the 2025 edition in a blitz playoff — his second Sinquefield title (as of July 2026).

How is the Sinquefield Cup structured? It’s a round-robin: a small field where everyone plays everyone in classical games, with rapid/blitz playoffs if there’s a tie for first.

Is the Sinquefield Cup part of the Grand Chess Tour? Yes — it has been the marquee classical stop on the Grand Chess Tour since 2015.

What happened at the 2022 Sinquefield Cup? Firouzja won the event, but it’s best known for the start of the Carlsen–Niemann controversy: Carlsen lost to Niemann and withdrew. No cheating was ever proven in that game, and a later lawsuit was dismissed and then settled privately.

Explore more

See every champion on the Sinquefield Cup winners list · Learn how the season works at the Grand Chess Tour · Meet the players who’ve starred in Saint Louis.

Researched and fact-checked by the Chess Lab Academy Editorial Team · Verified against Wikipedia, the Grand Chess Tour, and major chess media · Latest edition and 2026 schedule current as of July 2026 · Last verified 2026-07-11 · How we verify content.