Graeme Storm made a flying start to his second round at Prosper Golf Resort to move into the lead at the Moravia Silesia Open presented by ALO Diamonds.
The Englishman, who opened with a four under par 68, birdied four holes on his way out after starting at the tenth tee to reach eight under for the tournament.
That put him one shot clear of compatriot John Bickerton - who was one under for the day through 12 - and overnight leader Tano Goya, who was yet to start his second round.
Sweden’s Patrik Sjöland, England’s Chris Wood and Paraguay’s Fabrizio Zanotti also gained shots in the early exchanges to reach five under par, a shot behind England’s Steve Webster who remained on six under through nine.
Wood, who finished in the top five at The Open Championship for the second year running at Turnberry, birdied three holes in a row from the 11th - his second - and gained another shot at the 543 yard par five first.