Norwegian grandmaster Magnus Carlsen retained his world chess title on December 10 with fourth win over Russian challenger Ian Nepomniachtchi.
The world number 1 sealed victory by winning the 11th game of the 14-game series in their €2 million match in Dubai.
Carlsen, who turned 31 during the competition, has now won five world titles in a row, taking the first in 2013.
Nepomniachtchi resigned with a brief handshake and the two players exchanged a few words in the long-delayed standoff.
Their match started with five draws before the Norwegian won the longest game ever played at a world championships at nearly eight hours to unlock the contest.
Carlsen exploited mis-steps by his opponent to win games eight and nine. Then, as black in Friday's game 11, pounced on more inaccuracies by the Russian to retain the title 7.5-3.5 with three games still to play.
As winner he collects 60 per cent of the gargantuan prize fund.
Check out the video above to see how the events of the tournament unfolded.