Chess blindness of the Champions

by Johannes Fischer
11/16/2014 – Strange things happened in the sixth game of the World Championship in Sochi: Magnus Carlsen and Vishy Anand both suffered from an attack of chess blindness and overlooked a combination a lot of amateurs would have seen in a blitz game. In the end Carlsen was lucky and won the game. But has such a double blunder ever occurred in a World Championship match? Have a guess!