Four birdies in three holes around the turn pushed defending champion Thongchai Jaidee hot onto the heels of battling leader Tano Goya of Argentina at the Ballantine's Championship on Jeju Island.
Goya carded five birdies against three bogeys in his second round to top the leaderboard at eight under through 13 holes, one clear of Asian Number One Jaidee.
Over six hours were lost due to fog on day one so officials have taken the decision to reduce the tournament to 54 holes. The third and final round will be played on Sunday, with all the players expected to have completed their second rounds by Saturday afternoon. A traditional 36-hole cut will be applied at that stage.
With a three under par first round under his belt, Jaidee made the ideal start to the second round of his title defence with a birdie at the first.
The Thai had to wait until the eighth hole of the second round to make further improvements as he holed from 25 feet at the par three 17th after needing a fairway wood into the strong wind to reach the front of green.
The 40 year old continued to flourish with a superb approach over the water at the front of the par four 18th setting up a simple tap-in birdie. He holed out from six feet two holes later to keep the pressure on 21 year old Goya at seven under par through 11.
The weather disruption meant first round leader Marcus Fraser of Australia would not return until tomorrow morning to begin his second round, after the former Russian Open champion opened with a 65.
US PGA Championship winner Y E Yang, meanwhile, faces an uphill battle to even make the cut on his home island after failing to improve through 12 holes of his second round. He recorded two double bogeys in a five over par first round of 77.
