Having done well for five games, Anand seemed to have missed the thread completely in the sixth game played on Saturday and is now staring at a deficit of one point at the halfway stage of the 12-game million Euros match.
Carlsen was almost punishing Anand for his bad opening and was simply cruising when a rare double blunder happened on the fateful 26th move of the sixth game. This will go down in history as one of the worst double blunder as Anand failed to spot it too.
With Carlsen ahead 3.5-2.5 and six games to come, Anand will have to chalk out a plan to neutralise the Norwegian's big advantage in very quick time.
And that may not happen till the eighth game now as change in colours at halfway stage mean that Carlsen will again get white pieces in game seven to be played tomorrow.
It was a rest day after a loss in the second game that gave Anand time to recuperate and come back strongly to beat Carlsen in the third game. The situation is similar but the colour-change is not something that will help Anand.