Paced by a hole-in-one, defending champion Suzann Pettersen shot a 3-under 69 Friday to take a five-stroke lead after the second round at the Sunrise Championship.
Pettersen's ace on the 133-yard second hole helped her finish at 7 under after 36 holes, comfortably ahead of Sun Young Yoo and Carlota Ciganda at 2 under.
Pettersen's hole-in-one, the 19th this year, came on one of the two holes she bogeyed Thursday en route to a 4-under 68.
Her drive Friday landed near the center of the green, about 10 yards from the cup, before rolling in.
Pettersen is chasing Ingbee Park at the top of the LPGA rankings.
While the 32-year-old Norwegian cannot overhaul her South Korean rival this week, a Sunrise win would close the gap with two tournaments remaining. Park is not competing in the Taiwan event.
Yani Tseng, the 2011 Sunrise champion, shot a 6-over 78, leaving her 17 strokes off the pace.