Grandmaster (GM) Wesley So outclassed GM Alexander Shabalov in the seventh round to regain the share of lead in the 2016 US Chess Championship being held at the Chess Club and Scholastic Center of Saint Louis in Missouri, US.
So improved to 5.5 points to rejoin GM Fabiano Caruana on top of the standings.
Caruana drew his seventh-round match with GM Jeffrey Xiong.
Defending champion GM Hikaru Nakamura, GM Alexander Onischuk and GM Ray Robson also won their respective games in the seventh round.
Nakamura defeated GM Varuzhan Akobian, Onischuk thumped GM Samuel Shankland and Robson overpowered International Master Akshat Chandra.
Five-time champion GM Gata Kamsky and GM Aleksandr Lenderman agreed to a draw in the tournament which offers a total prize fund of $194,000 with the champion getting $50,000 and the runner-up taking home $35,000.
Robson is in solo third with five points, Nakamura in fourth with 4.5, Xiong and Onischuk in fifth with four each, Shabalov in seventh with three, Kamsky and Shankland in eighth with 2.5 apiece, and Chandra and GM Varuzhan Akobian with 1.5 each.
EMIL C. NOGUERA