Justin Rose sits six shots off the lead at the halfway stage of the Indonesian Masters after Poom Saksansin stormed out in front on day two.

Defending champion Rose ended the second day on eight under, leaving him in a share of fifth place, while Saksansin's second-round 63 gave him a three-shot lead over nearest challengers Suradit Yongcharoenchai and Jakraphan Premsirigorn.

After bad weather forced an early end to the opening day's play, Rose resumed his first round on five under with four holes to play.

But after cancelling out a bogey on the 16th with a birdie on the 17th, Rose dropped another shot at the par-five 18th to sign for a 68.

That indifferent form continued as he began his second round on the back nine, finding himself one over for the day after eight holes before notching a birdie at the 18th.

It proved a turning point as he made four birdies on his back nine to sign for another 68.

"For sure today it was a struggle early in my round," he said on asiantour.com. "I was one over par through eight holes. It was a bit more windy today.

"Today was tough to make birdies, I wasn't quite on my game. I kind of bounced back pretty well. My goal now is to play free golf at the weekend and chase the leader."