Niclas Fasth went into overdrive as his rivals back-pedalled to snatch the Daewoo Warsaw Open in Poland.
The 27-year-old Swede, who began the day four shots back, carded a second successive 67 for a total of 280, four under par, having only made the halfway cut on the limit after opening rounds of 73 at the First Warsaw Golf and Country Club.
He finished a shot clear of South African Hennie Otto, who returned 72, and two ahead of fellow Swede, Adam Mednick, who went round in a best-of-the-day 65, Knud Storegaard of Denmark, and Spain's Carl Suneson, the ranking leader.
Fasth's performance was stunning. He netted seven birdies in his 67 on a day when only 16 players broke par, not one of them being those ahead of him.
"I have won from this position many times before," he said. "It is quite comfortable coming from several shots back. It is more difficult to defend a lead.
"This victory, my first since I won the Tour Qualifying School in 1996 and my first on the Challenge Tour since 1993, will give me a new start. I've had a miserable year. I tried to play on both the US and European Tours in 1998 and it didn't work out.
"Then earlier this year I injured a knee playing on the Challenge Tour in Luxembourg and was out of action for three months."
Otto, who has now finished in the top four three times in five events, led by two at one stage but bogeyed twice in the closing four holes to see his chance disappear. The same went for Suneson, who returned 73 for 282.
The British challenge also petered out. Robert Coles. who shared the overnight lead, suffered two double-bogeys in a 76 for 285, while Iain Pyman carded a 73 for 284.
The honour of top Briton went to Southampton's Richard Bland with a 74 for 283 and joint sixth spot.
It was certainly a good day for the Swedes. Fasth might have been forced into a playoff if Mednick had started better than four over par. He found four birdies in a front-nine of 32 and two more coming home to equal the course record.
"I thought if I could post a low one it would make the boys think," he said. He did that but Fasth fought harder to collect the top prize of 16,659 euros.Final Results