Norwegian Magnus Carlsen has retained his crown as World Chess champion after defeating Russian challenger Sergey Karjakin in New York.
On his 26th birthday, Carlsen won 3-1 in Wednesday's tiebreakers, after the pair's 12-game match had ended in a 6-6 draw on Monday.
The match, which began in Manhattan on November 11, had been tense throughout.
Karjakin won game 8, leading to Carlsen's first loss of the match after 7 consecutive draws. In game 10 Carlsen tied the match with a win of his own.
Carlsen - a chess prodigy who became a Grandmaster at the age of 13 - first won the World Championship in 2013, defeating Viswanathan Anand from India. He has held the title ever since.
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