|-7 Kim (Kor); -6 Ko (Nzl), Kerr (USA); -5 Baek (Kor), So (Kor)|
|Selected others: -4 Parker (Eng); -1 Matthew (Sco), Boulden (Wal)|
Kim Hyo-joo shot a seven-under-par 65 to take a one-stroke lead after the first round of the Women's British Open at Turnberry in Scotland.
The South Korean, 20, produced a bogey-free round that included an eagle on the 449-yard par-five 14th.
New Zealand's world number two Lydia Ko, 17, and American Cristie Kerr are tied second after carding 66s.
England's Florentyna Parker is in a group of nine players three shots off the pace on four under.
World number one Inbee Park is a shot further behind after a three under 69.
Ko - top of the world rankings at the start of the year - prepared for the tournament by playing in the Scottish Open, where she finished fourth, and produced her best round at a major on Thursday.
"It can get windy here so it takes a lot of patience at times but when you get the opportunities you try and grab them," she said.
Charley Hull endured a disappointing day as the 19-year-old Englishwoman shot a one-over 73, leaving her eight shots off the pace.
|Ricoh Women's British Open|
|Venue: Turnberry, Ayrshire Dates: 30 July-2 August|
|Coverage: Live coverage on BBC Two (Friday, 13:00-17:15 BST, Saturday & Sunday, 14:00-18:00 BST), BBC Sport website, plus desktop, tablets, mobiles and app.|
Selected leaderboard (US unless stated):
65 Hyo Joo Kim (Kor)
66 Cristie Kerr, Lydia Ko (Nzl)
67 So Yeon Ryu (Kor), Q Baek (Prk)
68 Mika Miyazato (Jpn), Azahara Munoz (Spa), Suzann Pettersen (Nor), Shiho Oyama (Jpn), Teresa Lu (Tai), Katie Burnett, Florentyna Parker (Eng), Jin young Ko (Kor)
69 Misuzu Narita (Jpn), Beatriz Recari (Spa), Amy Yang (Kor), Inbee Park (Kor), Minjee Lee (Aus), Nicole Broch larsen (Den), Anna Nordqvist (Swe), Angela Stanford, Klara Spilkova (Cro)
70 Nanna koerstz Madsen (Den), Juli Inkster, Mi Hyang Lee (Kor), Kelly Shon, Jung Min Lee (Kor), Julieta Granada (Par), Camilla Lennarth (Swe), Gwladys Nocera (Fra), Gerina Piller, Luna Sobron (Spa), Danielle Kang, Alison Walshe, Mo Martin, Stacy Lewis
71 Marianne Skarpnord (Nor), Amy Boulden (Eng), Jennifer Song, Jenny Shin, Stacey Keating (Aus), Kim Kaufman, Shanshan Feng (Chn), Yumiko Yoshida (Jpn), Sun Young Yoo (Kor), Christina Kim, Catriona Matthew (Sco), Eun Hee Ji (Kor), Lexi Thompson, Paula Creamer, Ha Na Jang (Prk), Moriya Jutanugarn (Tha)
72 Felicity Johnson (Eng), Chella Choi (Kor), Charlotte Ellis (Eng), In Gee Chun (Kor), Maria Blomqvist (Swe), Xiyu Lin (Chn), Ssu-chia Cheng (Tpe), Yani Tseng (Tai), Ashleigh Simon (Rsa), Ayaka Watanbe (Jpn), Jessica Korda, Carly Booth (Sco), Mina Harigae, Jaye marie Green, Tiffany Joh, Rebecca Artis (Aus), Candie Kung (Tai), Ursula Wikstrom (Fin), Sophie Walker (Eng), Ai Miyazato (Jpn), Jane Park, Sakura Yokomine (Jpn), Na Yeon Choi (Kor), Alena Sharp (Can), Nina Holleder (Ger), Lizette Salas, Laura Davies (Eng)
73 Marina Alex, Emily k Pedersen (Den), Jenny Suh, Melissa Reid (Eng), Charley Hull (Eng), Brooke m. Henderson (Can), Natalie Gulbis, Caroline Hedwall (Swe), Maria Balikoeva (Rus), Ritsuko Ryu (Jpn), Alison Lee, Mi Jung Hur (Kor), Kelly Tan (Mas)
74 Mariajo Uribe (Col), Vikki Laing, Stephanie Meadow (Eng), Georgia Hall (Eng), Morgan Pressel, Kylie Walker (Sco), Sandra Gal (Ger), (x) Kristen Gillman, Karine Icher (Fra), Carlota Ciganda (Spa), Wei Ling Hsu (Tai), Hannah Burke (Eng), Hee Young Park (Kor)
75 Sydnee Michaels, Sei Young Kim (Kor), Lee-Anne Pace (Rsa), Beth Allen, Brittany Lincicome, Lucie Andre (Fra), Jade Schaeffer (Fra), Pornanong Phatlum (Tha), Austin Ernst, Haru Nomura (Jpn), Linnea Strom (Swe)
76 Ilhee Lee (Kor), Meena Lee (Kor), Marion Ricordeau (Fra), (x) Celine Boutier (Fra), Nicole Garcia (Rsa), Connie Jaffrey (Sco), Brittany Lang, P k Kongkraphan (Tha), Holly Clyburn (Eng), Michelle Wie, Dewi Claire Schreefel, Pamela Pretswell (Sco)
77 Pernilla Lindberg (Swe), Titiya Plucksataporn (Tha), Su-hyun Oh (Kor)
78 Aryia Jutanugarn (Tha), Min Seo Kwak (Kor), Jacqui Concolino, Isabelle Boineau (Fra)
79 Paula Reto (Rsa), Caroline Masson (Ger), Maria Mcbride (Swe), Sarah Kemp (Aus), Rebecca Hudson (Eng)
80Sally Watson (Sco), Anna-Lise Caudal (Fra), Karrie Webb (Aus)
82 Chiara Mertens (Ger)