Wesley So reclaimed the U.S. Championship Thursday after Fabiano Caruana snatched it away from him 24 hours earlier. So won the rapid playoff 1.5-0.5 in Saint Louis, capturing his fourth national title and ending Caruana's run at a fifth consecutive crown.

The collapse was stunning. So entered the final round holding a full point lead over Caruana. Against last-place Sam Sevian, So needed only a draw to clinch outright. Sevian had other plans. Playing with the desperation of a bottom-seed with nothing to lose, Sevian outplayed So in a heavy-piece endgame and took the full point. On the same afternoon, Caruana defeated Awonder Liang to create a tie at the top and force the playoff.

So's mental recovery mattered more than the technical chess in Thursday's rapid matches. A collapse like that breaks some players. Players choke in playoffs. So did not. He and Caruana played two games at rapid time controls. So won the first cleanly, giving up half a point in the second to secure the title without a third decisive game.

This is So's first U.S. Championship since 2021, a three-year gap in a tournament he has dominated at various points. Caruana remains a formidable defender, but he cannot claim five straight titles anymore. That streak is history.

The context here matters for rating trajectories and next year's field. Caruana held this title during a period when the U.S. championship became genuinely deep. Winning four times in six years (So's record now includes wins in 2017, 2018, 2019, and 2024) proves So's consistency at home. Caruana pushed him to the wire anyway, which speaks to the tournament's current strength.

Saint Louis, as always, hosted the event at the highest standards. The rapid playoff format worked as intended. A one-point lead with one round to go should mean the title is won. When it is not, a rapid tiebreak is the right solution. It punishes the player who faltered and rewards the one who stayed sharp.

So now owns the title going into 2025. Caruana will chase again next year. The defending champion in American chess is not one player anymore. The crown rotates among a small group of elite domestic talents, and So just proved he belongs firmly in that group. His fourth national title might not be his last.