Hans Niemann was the sole winner in Round 4 of the Open section at this year’s U.S. Championships. Playing Black, he defeated Sam Shankland to move into a tie for second place with defending champion Fabiano Caruana and Levon Aronian, half a point behind leader Wesley So, who drew his game against Abhimanyu Mishra. In the Women’s Championship, by contrast, five players scored victories. With second-placed Alice Lee drawing against defending champion Carissa Yip, leader Anna Sargsyan extended her lead to a full point thanks to her win over Megan Paragua. Thursday is a rest day in St. Louis. | Photos: Lennart Ootes / St. Louis Chess Club

