Korea's Jihee Kim carded a 1-under 70 on Tuesday and stands at 6-under 136, which ties her with 14-year-old Lydia Ko of New Zealand for medalist honors at the 2011 U.S. Women's Amateur at Rhode Island C.C. Kim, who shot a 66 in Monday's first round, said she struggled with her putter on Tuesday, registering 31 putts compared to 26 on Monday. This is Kim's first match-play competition, while Ko claimed the New Zealand Amateur title in April after winning the 72-hole medal. Ko is the No. 1-ranked amateur in the world, according to World Amateur Golf Ranking that is supported by The R&A and USGA. Kim, who is the No. 98-ranked female in the world, did shoot a 63 in last fall's Women's World Amateur Team Championship in leading Korea to a remarkable 17-stroke win over the USA in Argentina. She is coming off a T-21 effort at last month's Callaway Junior World event at Torrey Pines in San Diego.