Sebastian Vettel made it four wins in a row to strengthen his already commanding grip on the title with another dominant performance in the Korean Grand Prix.
Vettel kept his pursuers, chiefly Romain Grosjean and later the second Lotus of Kimi Raikkonen, at arm's length throughout the 55-lap race, which was interrupted twice in quick succession by safety cars.
Nico Hulkenberg came through the drama to take a hard-earned fourth.
A perfect start allowed the Red Bull driver to ease ahead of Grosjean and the Mercedes of Lewis Hamilton, as further back Jenson Button got tangled up with Ferrari teammates Fernando Alonso and Felipe Massa.
Alonso continued undeterred but could only finish sixth, meaning Vettel's extended his championship lead to 77 points. He can wrap up the title in Japan if he wins and Alonso fails to finish.
Hamilton's challenge for victory faded just before the second round of stops as his Pirelli tyres "fell off the cliff", dropping him behind Raikkonen.
A safety car, caused by a bizarre tyre failure for Sergio Perez, minimised the damage to Hamilton's race and allowed him to rejoin fourth. The restart was short-lived though, for while Vettel set about immediately opening up his lead again, over Raikkonen this time, the Finn having passed Grosjean, Adrian Sutil lunged Mark Webber into Turn 3, hitting the Red Bull and ending his own race.
Webber continued, but a dramatic fire meant it was only for a further few corners. As the safety car was deployed, a fire vehicle emerged on track before the race had been neutralised, creating an odd but potentially dangerous situation as the leaders rounded Turns 1 and 2.
Thankfully, there was no serious incident, and once Webber's car was cleared and racing resumed, Vettel eased clear.
Raikkonen fought off Grosjean to take second while behind Hulkenberg produced a superb defensive performance in the closing laps to take fourth ahead of Hamilton and Alonso.
Nico Rosberg, Button, Massa and Perez completed the top 10.
Here's how the race unfolded: