What happened in the first round?

Jung So-yi carded nine birdies and three bogeys on October 29 to shoot 6-under 66 at Elysian Jeju Country Club, earning the sole lead of the 20th S-OIL Championship. Lee Ye-won sits one shot back at 5-under after a bogey-free round.

How did Jung So-yi build her round?

After three straight birdies from the 12th hole and an 8.1-meter putt on the 14th, Jung hit a rough stretch with bogeys on the 2nd and 3rd holes, both involving three-putts. She rallied by making five birdies over her last six holes, including three in a row from the 4th to the 6th.

Who is chasing the title?

Lee Ye-won has one win this season and has finished in the top 10 in five of her last six starts, according to the tournament results. Defending champion Ko Ji-won is tied for third at 4-under after an eagle on the final hole. She is from Jeju and won both of her titles last year in her home province.

What does this mean for the season race?

Kim Min-sol is the season money leader and would clinch the money title by winning, but she shot even par and is tied for 34th. With two events left on the schedule, the season's remaining titles are still up for grabs.

For international fans

Jung So-yi joined the tour in 2020 and is still searching for her first KLPGA title. Jo A-yeon, the 2019 Rookie of the Year with four career wins, announced her retirement after finishing tied for 47th in the first round.