World Chess Champion Magnus Carlsen exited an online tournament on Thursday after accidentally moving his queen to the wrong square, allowing rival Hikaru Nakamura to take it with his king and ultimately win the match. Chess.com called the move a "horror mouseslip" for Carlsen, who left the event in third place with $15,000.
After beating Carlsen in that armageddon match (a special ruleset for tiebreakers), Nakamura went on to win the Chessable Masters tournament and its $30,000 top prize on Friday, putting him ahead of Carlsen in the rankings for this year's multi-event Champions Chess Tour.
