WILLIAMSBURG (Virginia) (REUTERS) - Thailand's Ariya Jutanugarn birdied three of the last six holes to break clear of a tightly bunched leaderboard in Saturday's third round of the Kingsmill Championship.

Two weeks after winning her first LPGA Tour title at the Yokohama Tyre LPGA Classic in Alabama, the 20-year-old fired a flawless six-under 65 on the rain-softened River Course at Kingsmill Resort.

The fast-finishing Thai birdied the 13th, 14th and 17th to post a 10-under total of 203, ending the day a stroke in front of South Korean Chun In Gee (62), Thailand's Pornanong Phatlum (65) and second-round leader Ryu So Yeon of South Korea (69).

New Zealand's world No. 1 Lydia Ko was six strokes off the pace after carding a second successive 68.