Brooke Henderson bogeyed the final two holes for a 4-under 67, leaving the 19-year-old Canadian with a two-stroke lead.
"Two bogeys to finish, but that just gives me a little more motivation going into tomorrow". Shin said. "But it just kept going".
"It was just a matter of staying patient", Thompson said of her key for Saturday.More news: Apple is going to stop app developers from harassing you
Thompson, who has shown wonderful resilience to bounce back from the heartache and controversy surrounding the four shot penalty she incurred during the final round of the ANA Inspiration, completed a round of 64 to come from two off the 36 hole pace to take the lead into the final round. "There's like a million names within the top 10, so hopefully I can just get out front early and just keep it there".
Her younger sister, world No.1, Ariya fired a 69 in a roller-coaster round with one eagle, three birdies, one double bogey and one bogey. I rolled the ball good on the green.
Seven golfers, meanwhile, are one shot further back at 10-under, just five shots back of the lead.More news: Ronaldo scores twice as Real Madrid win Champions League title
Thompson won the Kingsmill Championship last month in Virginia for her eighth LPGA Tour title after losing the ANA Inspiration in a playoff after being penalized four strokes for a rules violation reported by a television viewer.
Flooding on the golf course caused the par five 5th hole to be played as a par three today resulting in the golf course being played as a par 69 and Thompson's round of 5 under was in fact a 64. I was looking at birdie nearly every hole, which is quite nice. "I just changed the irons and it's made all the difference", said Pace.More news: Director John Avildsen dies at 81; won Oscar for 'Rocky'
New Zealand's Lydio Ko finished the tournament in a tie for tenth after a final round one-under 68 while Australia's Sarah Jane Smith finished in a tie for 37th.