Mardan Mamat of Singapore shot a 6-under-par 66 Saturday in the third round to regain the lead at the King's Cup with a one-stroke advantage over Thailand's Thaworn Wiratchant.
The 45-year-old Mamat led after the opening round and sank seven birdies this time round — including on his last hole — to move to 17-under 199. His lone bogey was on the sixth.
Thaworn, also age 45, finished with four birdies on Nos. 15-18 at the Singha Park Khon Kaen Golf Club.
''It's going to be tough to beat this old guy (Thaworn) here. If you can get a one-stroke advantage, you've got to take it because he can shoot a low number anytime,'' said Mamat, who is chasing his fourth Asian Tour title.
Thaworn has steadily improved each round from 69 and 66 on the first two days to 65 on Saturday.
''I was playing well but my tee-off shots and iron shots were not good. Luckily I chipped well, chipping in for three holes. I just have to work more on my driving,' '' Thaworn said.
A further stroke behind was Pariya Junhasavasdikul (66) who briefly led the field after 15 holes until back-to-back bogeys on Nos. 16 and 17.
Friday's leader Suppakorn Utaipat of Thailand had a triple bogey on the 13th to finish with a 74. He dropped to joint 14th.