PORTLAND, Ore. -- I.K. Kim increased her lead to three strokes Friday in the LPGA Tour's Portland Classic, shooting a 5-under 67 to reach 12 under.
The South Korean player had seven birdies and two bogeys in her morning round in cloudy, calm conditions at Columbia Edgewater. She won the last of her three LPGA Tour titles in 2010, and had a victory this summer in a Ladies European Tour event in England.
Spain's Carlota Ciganda and South Korea's Mi Jung Hur shot 65 to join Laura Diaz at 9 under. Diaz had a 68.
South Korea's So Yeon Ryu, the Canadian Women's Open winner Sunday in Ontario, was 8 under along with Mina Harigae, China's Xi Yu Lin and South Africa's Paula Reto. The fifth-ranked Ryu had a 66, Lin carded a 68, and Harigae and Reto shot 69.
Defending champion Suzann Pettersen was 6 under after a 67. The fourth-ranked Norwegian player also won the 2011 event.
Juli Inkster and Sweden's Anna Nordqvist also were in the group at 6 under. The 54-year-old Inkster, making her 28th appearance in the event, followed her opening 68 with a 70. Nordqvist, a two-time winner this year, also shot 70.
South Korea's Jeong Jang was 3 under after a 71. The 34-year-old Jang, the 2005 Women's British Open champion, announced her retirement this week and said the event will be her last.
Hee-Won Han, also playing her final event, had a 71 to make the cut on the number at 1 over. The 34-year-old South Korean player won the 2004 event and has six LPGA Tour victories.
Gigi Stoll, a senior at Beaverton High School who won the Portland Classic Amateur Open last week to earn a spot in the field, had a 74 to make the cut at 1 over.
Charley Hull, the 18-year-old English player who got into the event on a sponsor exemption, missed the cut by a stroke with rounds of 70 and 76.
Top-ranked Stacy Lewis, No. 2 Inbee Park and No. 3 Lydia Ko are skipping the tournament, giving them a two-week break before the Evian Championship in France.