Ray Robson (2656) beat Naroditsky (2633) with the Black pieces to join Hikaru Nakamura in lead with 5 points at the end of round 7. Robson had beaten Wesley So in the earlier round.
Wesley So (2788) got the better of Onishcuk (2665) and is in second spot with 4.5/7 points, while Kamsky (2683) beat Holt (2530).
In the Women’s section, Katerina Nemcova continued her winning spree and beat Virkud to lead with 6/7 points.
The US Chess Championship will be played over 11 rounds.