Pettersen hasn't had a bogey over the first three days of play and is at 18-under-par 198 overall after a 4-under 68 Saturday. Kim Song-hee also shot 68 in the third round and is alone in second at 13-under. Yani Tseng (68), Ai Miyazato (70) and Momoko Ueda (69) are tied for third at 12-under 204.
Pettersen began her round, just as she did the first two, with a birdie at the par-5 first hole. After eight consecutive pars she birdied the par-5 10th.
Another string of pars got her to the 17th hole, which she birdied. She finished with a birdie at the par-5 18th.
Pettersen played the four par 5s at the Siam Country Club at 11-under this week.
She birdied Nos. 1 and 10 each round and had a birdie and two pars at No. 7. Pettersen eagled the finishing hole Thursday and had birdies there Friday and Saturday.
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