Caruana ground down Robson in a marathon endgame to reach three points and tie Wesley So for the lead in the 2026 U.S. Championship. The win showcased Caruana's technical mastery in the kind of drawn-out position where precision matters more than brilliance.
So maintained his perch at the top after round four, though the article doesn't detail his specific result. With both players at 3/4, the championship remains wide open heading into the second half of the tournament.
Round four played out as a technical affair across the board. Endgames dominated the day's action, which typically signals tighter, more defensive chess from the field. When positions simplify early, it becomes nearly impossible for trailing players to generate winning chances quickly.
In the women's championship, Jennifer Lee seized sole first place, breaking away from her competition. The specific details of her win aren't provided, but holding the outright lead this early suggests she found concrete advantages against quality opposition.
The championship structure means the field still has plenty of opportunity to recover or extend leads. With roughly half the rounds complete, players like Xiong and Oparin remain very much in contention despite not making headlines in round four. The grinding nature of these matches suggests the championship could go to whoever handles the pressure best down the stretch.