Thomas Pieters turned in 35 to keep a share of the lead as the weather-delayed second day of the D+D Real Czech Masters got into full swing at Albatross Golf Resort.
Just over two hours had been played when the players were taken off due to lightning and it was almost 90 minutes before the action resumed in Prague.
When it did, Belgium's Pieters and Malaysian Gavin Green both picked up a shot to move to nine under, one clear of Finn Tapio Pulkkanen.
Three-time Major Championship winner Padraig Harrington, Scotland's Scott Jamieson and Englishman Callum Tarren were then at seven under out on the course.
Last season's Road to Oman winner Pulkkanen was out in the very first group of the day off the tenth and he birdied his opening hole to quickly move into a share of the lead.
Joint overnight-leader John Daly dropped a shot on the 13th before the hooter sounded but showed no ill effects upon the resumption, hitting a stunning approach into the 14th to rejoin the lead.
Pieters had dropped out of a share of top spot by bogeying the same hole when he restarted but he bounced straight back on the next.
Tarren also dropped a shot straight after the resumption on the third and was soon two back as Pulkkanen edged ahead from four feet on the first before Pieters joined him after a tee-shot to seven feet on the par three 16th.
Green was the next man to rejoin the lead as he took advantage of the par five 12th and the men at the top were soon three clear as Daly three-putted from the fringe on the 16th.
A bogey at the third dropped Pulkkanen back to eight under and when Daly saw a short one lip out on the seventh, he was heading in the wrong direction.
Jamieson was one under for the day when the players were taken off but he birdied the 16th upon the resumption, then found the water for a bogey on the 18th before picking the shot straight back up from ten feet.
Harrington made a birdie and a bogey before the stoppage but a stunning approach to the 18th moved him back into red numbers for the day.
Nacho Elvira, Andrea Pavan, Lee Slattery and Jeff Winther were among the later starters at seven under, a shot clear of Daly, English pair Matthew Baldwin and Ryan Evans, Italian Nino Bertasio, Australia's Andrew Dodt and Swede Peter Hanson.
