Norway's Magnus Carlsen has retained his world chess championship title, defeating Russia's Sergei Karjakian in a lightning-fast tie-breaker.
Carlsen won the final round at the championship in New York City on November 30, which came after 12 games played over the past three weeks.
The tournament has drawn massive attention, with organizers saying about 6 million people around the world were following the final quick tie-breaking games.
Hundreds of spectators jammed into a refurbished lower Manhattan building that once was the city's fish market to watch the face-off.
Carlsen won 600,000 euros ($637,000) in prize money.
As the runner-up, Karjakian won 400,000 euros.
Carlsen, who celebrated his 26th birthday on November 30, first became a grandmaster -- the highest title in chess -- at age 13. He has held the title of world champion since he first won it in 2013.