So Yeon Ryu shoots 64 to take Kingsmill Championship lead

So Yeon Ryu, of South Korea, watches her tee shot on the ninth hole during the second round of the Kingsmill Championship golf tournament at the Kingsmill Resort in Williamsburg, Va., Friday, May 20, 2016. Ryu finished with a 7-under-par 64, leaving her at 7-under after two rounds. (AP Photo/Steve Helber)
Steve Helber/AP

WILLIAMSBURG, Va. (AP) So Yeon Ryu had six birdies in an eight-hole stretch and shot a 7-under 64 on Friday to take the second-round lead in the Kingsmill Championship.

Ranked 11th in the world but sixth in the race for the four spots on South Korea's Olympic team, Ryu opened with a bogey on the 10th hole, then used the birdie run to make the turn in 5-under 30.

The 2011 U.S. Women's Open champion added birdies on the par-4 fourth and par-5 seventh and closed with two pars to reach 7-under 135 on the soggy River Course.

Fourth-ranked Stacy Lewis, No. 6 Amy Yang and first-round leader Mika Miyazato were a stroke back. Lewis had a bogey-free 66, Yang had a 67, and Miyazato followed her opening 65 with a 71.

Lewis tied for second two weeks ago in Alabama for her 10th runner-up finish in a 49-event drought. The 11-time tour winner has 23 career second-place finishes.

Top-ranked Lydia Ko was 1 under after 68.