Chun In-gee equals record to surge into Women’s  PGA Championship lead South Korea’s Chun In-gee fired a record-equaling eight-under-par 64 to surge into a commanding five-shot lead at the Women’s PGA Championship on Thursday.

The 27-year-old two-time major champion reeled off nine birdies and only one bogey at Congressional Country Club outside Washington to match the lowest opening round in the history of the Women’s PGA Championship set by Nicole Castrale in 2006.Chun’s remarkable round was also a course record at Congressional, the historic 98-year-old venue which is hosting a women’s major championship for the first time. Shrugging off wet conditions that made the course play longer — two inches of rain had been dumped on the layout overnight — Chun’s round erupted just before the turn when she reeled off four straight birdies to move to five under. A bogey on her 10th hole of the day briefly interrupted her momentum before another trio of birdies on her 11th, 12th and 13th holes took her to seven under. One more birdie three holes from home left her on eight under.