Stacy Lewis continued her excellent start to the season as she claimed a two-shot lead at the halfway stage of the HSBC Women's Champions in Singapore.
The American carded a faultless six-birdie 66 on day two at Sentosa Golf Club as she bids to atone for last weekend's poor finish in Thailand, where she started the final round in the lead before stumbling to a closing 76.
"Last week, my putter just went sideways," said Lewis, who moved two shots clear of overnight leader Azahara Munoz and five others on nine under par.
"I don't know what happened. But I feel a lot more comfortable with my putter this week. You can't force things, and last week I definitely was trying to force some putts and hit them too hard and through breaks.
Ariya Jutanugarn and Na Yeon Choi matched Lewis' 66 to join the share of second place alongside Munoz (70), Paula Creamer (67), Chella Choi and Sun Young Yoon.
Scotland's Catriona Matthew goes into the weekend six shots adrift after failing to build on a flying start to her second round, nailing birdie putts at three of the first four holes.
Matthew added another birdie at 11 before giving it back at 13 and parring in to post a 69, while England's Jodi Ewart Shadoff is in contention on four under after a 71.
World No 1 Yani Tseng, without a victory in almost a year, slipped eight shots off the pace after labouring to an error-strewn 73 which featured only one birdie.