So Beats Caruana 1.5-0.5 in Playoff for Fourth US Title

GM Wesley So won the 2026 U.S. Chess Championship, beating defending champion GM Fabiano Caruana 1.5-0.5 in rapid tiebreaks. It is his fourth national title and comes with $56,000.

The route there was about as bad as it could have been. In round 11, So lost to GM Sam Sevian, and Caruana won on demand in his own game just to force the playoff. We had followed So’s run from the sole lead on 5/7 to a point where he looked one round from the title, and the last-round collapse undid all of it.

A nearly sleepless night

So said he barely slept: “I didn’t sleep well at all… only two or three hours.” He was, by his own account, not in the mood to play.

He was generous about the man who beat him.

“Kudos to Sam. He had a very tough tournament. I was shocked with the way he played a really good game, but I also played very badly.”

Four titles across nine years

So first won in 2017, then in 2020 and 2021. This one arrives five years after the last. Even after the round 11 loss, he still ranks 2017 as the hardest, since that field included a 2817-rated Caruana, a 2793-rated Nakamura and GM Alex Onischuk, who also played at a 2800+ level, according to So.

Caruana had been chasing history of his own: a fifth straight title and Reshevsky’s record. That ends here.

A sloppy playoff, by So’s account

So described the whole championship as unusually blunder-heavy. He said he was losing against GMs Ray Robson and Jeffery Xiong and still won both games.

The playoff was no cleaner, in his words “very poor quality for both of us. So many blunders and so many mistakes.”

Both had just played the 2026 Chess Olympiad in Uzbekistan.

“In the end, I was really on my last breath. I was literally seeing 10 pawns for Black; my mind was all over the place. But I think Fabi was extremely tired too.”

Game one: the one that got away

The first game was drawn, and it was So who let a win slip. Playing Black in a Nimzo-Indian Defense, he reached a winning advantage and could have finished it with 34…Qd4+ and 35…Ra1. Chess.com calls that not a hard combination under normal circumstances, which is a reminder of what fatigue and nerves do.

Caruana then saved a dead-lost, pawn-down endgame. A half point from a position like that would normally swing a playoff, and it is easy to imagine the loss from the night before weighing on So’s mind. He got the 1.5-0.5 anyway.

Given the circumstances, a draw in game one and a win in game two was enough to take the title back for the first time since 2021.

What’s next

In the Women’s section, WIM Rachael Li won the 2026 U.S. Women’s Chess Championship in round 11 without any playoffs.

The next big event at the Saint Louis Chess Club is the 2026 Clutch Chess Champions Showdown. GMs Javokhir Sindarov, Caruana, Hikaru Nakamura and Praggnanandhaa Rameshbabu play over three days starting Tuesday, October 27, at 1 p.m. ET.