Karine Icher of France shot a second-round 4-under 68 to take a one-stroke lead atop the European-dominated leaderboard at the KEB-HanaBank Championship on Friday.
Icher birdied three of her final four holes for a 5-under-par total of 139 on the Ocean Course at the Sky72 Golf Club.
American Brittany Lincicome, who birdied her final two holes for a 70, and Beatriz Ricari of Spain (70), were tied for second.
Azahara Munoz of Spain (69) was among those tied for fourth, two strokes behind, as was Suzann Pettersen of Norway and Sandra Gal of Germany, who shot 71s.
The wind subsided but Icher said she played "a completely different course" in the second round because of the changing wind directions.
"This week, my coach was here and we practiced a lot of low shots," she said. "It seemed to pay off. Here, it's always windy. I've never played in Korea without wind. Low shots are pretty strong in my game now."
Icher has five victories on the Ladies European Tour but none on the U.S. LPGA circuit.
No. 3 Lydia Ko of New Zealand shot 69 after an opening 73 and was three strokes behind and tied for 10th along with Haeji Kang of South Korea, who led by two strokes after an opening 67 but shot 75.
Second-ranked Inbee Park, who could move to No. 1 with a win in the absence of top-ranked Stacy Lewis of the United States, carded 73 and was five strokes behind Icher.
U.S. Women's Open champion Michelle Wie improved from her opening 76 with a 70, and was seven strokes off the lead. Wie is making her first start since withdrawing during the first round of the Evian Championship in September after reinjuring a stress fracture in her right hand.
Women's British Open winner Mo Martin also improved from her opening 78 with a 69 in her return from a thumb injury. She's eight strokes behind.
Defending champion Amy Yang of South Korea, who made 69 on Thursday, posted 79 with eight bogeys and one birdie and was nine behind Icher.
There was no second-round cut in the field of 78.
