Magnus Carlsen’s last event as world champion ended in failure as a dramatic match-losing mouseslip against Hikaru Nakamura dumped him out of the Chessable Masters.

According to information received here, Carlsen and his old rival, the two big beasts of online chess, had gone toe-to-toe over two drawn rapid games before the Losers Bracket Final was left hanging on a tense Armageddon play-off.