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FORT WAYNE, Ind. -- Ariya Jutanugarn of Thailand used a women's competitive course record 6-under-par 66 Wednesday to create a seemingly insurmountable 10-stroke lead in the Girls' Division heading into the final round of the 36th Junior PGA Championship presented by Under Armour and Heritage F.S.E.
Cody Proveaux of Leesville, S.C., used a near flawless third-round 67 to lead the Boys' Division by three strokes over Zachary Wright of Phoenix, who led after each of the first two rounds. Wright struggled to a 77.
The Championship is being hosted for the second consecutive year by Sycamore Hills Golf Club.
Jutanugarn, whose 203 total matches the 54-hole scoring mark in Championship history, played a bogey-free round that featured six birdies. She broke the previous competitive course record of 67, held by Kathy Hartwiger of Birmingham, Ala., who accomplished the feat at the 2009 USGA States Team Championship.
"I made no bogeys and I am so proud of that," said Jutanugarn, 15. "Everything is good this week and I am very confident in my game too."
Jutanugarn, who is competing in her second Junior PGA Championship, has already logged 17 birdies through 54 holes. She was particularly pleased to birdie the par-4 10th hole, which she had double-bogeyed in the second round.
"I really wanted to birdie that hole and it makes me so happy," said Jutanugarn.
Several additional Championship records are within her reach. Debbie Hall, the 1977 girls' division Champion, holds the record for largest margin of victory (13 strokes) and Aree Song of Thailand holds the lowest score in relation to par (271).
"My target coming into this year was to beat last year," said Jutanugarn, who finished alone in fourth in 2010. "This tournament is like a major and I would be so proud to win."
Mariah Stackhouse of Riverdale, Ga., is in second place overall at 213.
"She is playing so well, obviously," said Stackhouse, who shot a third-round 73. "I am disappointed in how I have played the last two days. But I can't pay attention to what anyone else is doing. I just have to go out and play well tomorrow."
Casey Danielson of Osceola, Wis., the first-round leader, is third, 12 strokes back.
Defending Champion Cassy Isagawa of Wailuku, Hawaii, posted a 75 and sits in a tie for ninth.
Proveaux, who played in the second-to-last group, was scoreboard-watching and realized he had the lead at No. 13.
"I was hitting the ball well all day long, and I knew I could go low if my putter would work," said Proveaux, who used six birdies to offset a single bogey. "I was 2-under through three and realized the putter was going to help."
Proveaux, who has four runner-up finishes in the last year, is looking for a victory to cap off what has been a great summer.
"I have been playing well for a while now and just haven't caught the right breaks," said Proveaux. "I really want to pull out a victory this week. It would be special."
Wright, who owned a five-stroke lead heading in the third round, had a double bogey at the third hole and a triple bogey at No. 10.
"I felt like I hit the ball pretty well but made a few mistakes that really cost me today," said Wright, who could only manage two birdies in his third round. "I made an 8 from 75 yards away when I should have made birdie. I have an aggressive game and maybe I just need to play from behind to play really well. I sure hope I do."
The 72-hole Championship featured a 54-hole cut to the low 30 boys and 30 girls, including ties. Thirty-two boys made the cut at 225 and 34 girls advanced from a cut at 234.
This year's field includes past winners of the Championship, PGA Junior Series event champions, PGA Section winners, many of Polo Golf and Golfweek's top-ranked players, and selected national junior tournament winners.
Golf Channel will present a one-hour highlight show of the 36th Junior PGA Championship, with the first airing on Thurs., Sept. 8, at 7:00 p.m. ET.
Begun in 1976, the Junior PGA Championship has traditionally produced unforgettable golf performances and brings together the best junior golfers from around the country to compete for the Jack Nicklaus Trophy in the Boys' Division and the Patty Berg Trophy in the Girls' Division.