Taiwan's Chien, the world's 189th-ranked player, was among the early starters at the Jack Nicklaus designed Club at Carlton Woods near Houston, mixing six birdies with a bogey to top the leaderboard.

However, she will be looking over her shoulder at a chasing pack of six players including Tokyo Olympic gold medallist Korda, who signed for a 68 along with Japan's Ayaka Furue, Australian Stephanie Kyriacou, South Korea's Chella Choi and Americans Marina Alex and Lilia Vu.

Vu and Kyriacou both jumped up the leaderboard with late eagles, the American's coming on her penultimate hole and the Australian's on her last.

England's Georgia Hall sits three shots off the lead on two under, while her compatriots Jodi Ewart Shadoff and Charlotte Thomas both carded one-over 73s.

Ireland's Leona Maguire is further back on four over, while England's Charley Hull endured a nightmare opening round with seven bogeys and no birdies in her 79.

• Chevron Championship: Latest scores

Korda, who is hunting a second major following her triumph at the 2021 Women's PGA Championship, missed last year's Chevron due to injury but is back to full fitness and has four top-six finishes in five starts this season.

"I took advantage of the par-fives today, I think I birdied them all, so that was important," said Korda, who was among the late starters and sat out an hour during a dangerous weather delay. "Overall I played pretty well. It was nice to finish the way I did with just a tap-in birdie."

With the Chevron moving to The Club at Carlton Woods after calling the Mission Hills Country Club in Rancho Mirage, California home for 51 years, the nine past champions in the field, including world No 1 Lydia Ko and 2022 winner Jennifer Kupcho, have no home-field advantage.

Kupcho opened her title defence with a level-par 72.

Ko had a rollercoaster round, including four birdies and three bogeys, which left the New Zealander on one-under 71, alongside Canada's twice major winner Brooke Henderson.

"It wasn't my sharpest," said Ko. "But to start off at under par I think is a good way to start this week. It's not easy."

Chien certainly found the move to Texas to her liking.

Playing the back nine first, she made the turn at two under before making her only bogey of the day at the first. The 32-year-old recovered in style to card four birdies over her final six holes.

"I saw the pin sheet last night, and I can't sleep," said Chien, who came to the major off her best result of the season, a tie for fourth at last week's LOTTE Championship. "It feels so hard. I think we did very well today."

Watch round two of The Chevron Championship live on Sky Sports Golf from 4pm to 8pm on Friday, and on Sky Sports Main Event and Sky Sports Golf from 11pm. Both sessions are also live - for free - on the Sky Sports Golf YouTube channel.