World No. 1 chess player Magnus Carlsen forfeited a World Blitz Championship match against Haik M Martirosyan after knocking over pieces with two seconds left on his clock. Under blitz rules, players must restore the board position before stopping the clock. Carlsen's failure to do so, compounded by using both hands to rearrange pieces, led to the arbiter ruling in Martirosyan's favor. This incident followed another tense outing for Carlsen in the championship.