Lexi Thompson completed a dominant performance at the LPGA Thailand to clinch her seventh Tour title.
The American had taken command with an eight-under-par 64 on the opening day on Thursday and, after repeating the feat on Saturday, went into the last day with a four-shot lead.
And the 21-year-old made sure of victory with a four-under final round of 68, which featured an eagle at the 10th, to win by six shots from Chun In-gee.
Chun started her round with three straight birdies but could not maintain that consistency, posting four bogeys and a double as her hopes ended.
Asked at the presentation when she felt able to relax, Thompson replied: "Maybe 17's green. I never like to count it as a win until it's over with, I just tried to play aggressive and play my best out there.
"She [Chun] played great the whole day but with the start, just on a birdie rampage right off number one. I was just trying to play my own game, I knew I was going to have to make birdies and play a solid round out there.
"My goal was to get to 20 under and just make a lot of birdies."
With the win, Thompson is projected to leapfrog Stacey Lewis to number three in the women's world rankings, taking her place as the highest-ranked American.