South Korean Haeran Ryu shot a 10-under 62 on Friday to take a commanding lead into the clubhouse at the inaugural FM Championship on Friday at TPC Boston in Norton, Mass.

Ryu recorded a 69 on Thursday, leaving her at 13-under after two rounds. First-round leader Marina Alex finished play Friday with an even-par 72 after an opening round of 68. She was at 4-under, well behind Ryu and in a tie for sixth.

Japan’s Yuri Yoshida and Lauren Coughlin, second after rounds of 69 on Thursday, teed off later in the day.

Ryu stood at 7-under after four consecutive birdies on Nos. 4-7 on Friday, and she added birdies on Nos. 10 and 12 before reeling off another four in a row beginning at No. 14. On the day, she hit all 18 greens in regulation and required just 26 putts.

In her second season on the tour, the 23-year-old Ryu has one career win.

Australian Robyn Choi (68 Friday) and American Yealimi Noh (69) stood at 7-under 137 for the tournament but were six shots off the lead after the morning wave of players.

Choi rebounded from two bogeys in the first five holes and answered with six birdies the rest of the round, and Noh was bogey-free.

South Korean Jin Young Ko’s 67 moved her to 5-under, and Celine Borge of Norway (68) was one shot back and alone in fifth place.

In the afternoon wave, Jennifer Kupcho and Rose Zhang will try to move above the cut line. The pair, both members of the U.S. Solheim Cup team, opened with 75s on Thursday. France’s Celine Boutier, who will play in the event next month for Team Europe, also faces missing the cut after a 77 in the first round.