Amy Yang holds a one-stroke lead over three contenders after the second round of the Honda LPGA Thailand at Siam Country Club.
Jessica Korda fired a 66 in her second round to get to 8 under, one back of Yang, along with Q Baek and Lexi Thompson, who shot 71 and 72.
Thompson fired a 64 Thursday to take the first round lead, but had more trouble on Friday as she made three bogeys to three birdies to hang at even par.
Yang played a flawless back nine with three birdies en route to her 69.