FORT WAYNE, Ind. (AP) -- Ariya Jutanugarn of Thailand shot a competitive course record of 6-under 66 at Sycamore Hills Golf Club for a 10-stroke lead heading into the final round of the 36th Junior PGA Championship.
She is at 13 under, while Mariah Stackhouse of Riverdale, Ga., is second after shooting 73.
Cody Proveaux of Leesville, S.C., shot a 67 to take the boys lead at 7 under, three strokes ahead of Phoenix's Zachary Wright, who shot 77.
Jutanugarn's round, which included six birdies, was one stroke better than the score posted here by Kathy Hartwiger of Birmingham, Ala., in the 2009 United States Golf Association Women's State Team Championship.
Jutanugarn is chasing the tournament record of 17-under 271, set by Aree Song, also of Thailand, in 1999 at PGA National.