Briton Jenson Button extended his lead at the head of the drivers' world championship to more than 20 points on Sunday when he cruised to an unexpectedly comfortable victory in the Turkish Grand Prix.
The 29-year-old Englishman, once again revelling in the excellence of his Brawn GP car, clinched his sixth win in seven races this season with a virtually flawless demonstration of smooth and well-judged racing.
Gifted the lead on the opening lap, when pole-sitting German Sebastian Vettel made a mistake and ran off while leading, Button took control and measured his drive to perfection to record the seventh win of his reborn career.
It was also the first time in five Turkish Grands Prix that the driver who started on pole failed to win the 58-laps race.
Vettel recovered from his impetuous early error and, after a switch of strategy, battled to come home third on the rear wheels of his Red Bull team-mate Australian Mark Webber who came home second, 20 seconds behind Button.
Vettel completed the podium ahead of Italian Jarno Trulli in a Toyota, German Nico Rosberg for Williams and Brazilian Felipe Massa, who was sixth for Ferrari.
Pole Robert Kubica confirmed BMW Sauber's revival after a disappointing start to the season, by finishing seventh ahead of German Timo Glock in the second Toyota.
Button's win was his fourth in succession and lifted him to 61 points in the drivers championship, 26 more than his nearest challenger and Brawn team-mate Brazilian Rubens Barrichello, who made a bad start and was later forced to retire from the race.
Defending drivers' champion Briton Lewis Hamilton of McLaren Mercedes started from 16th on the grid and battled his way through to finish 13th.
The result enlarged Brawn's lead in the constructors' championship - they now lead with 96 points ahead of Red Bull on 56.5 points.
The next race is Button's and Brawn's home British Grand Prix at Silverstone on June 21.