Due to the volcanic ash resulting in flight delays, Anand was tired in the first game, which he lost by making a blunder in move 23. He should have definitely won game 9. Surprisingly, he ran short of time and had to play move 40 in two minutes. He should have exchanged two rooks for the queen but he played Rh8+. Topalov replied with Kd7, which was followed by Anand's Rh7+. I think he should have played Re4 instead of Rh8.
In game 12, people are calling move 38 by Topalov i.e., Qf1 as a blunder but I feel that 31. exf5 by Topalov was a blunder. Anand immediately replied with Qxe4 and he had nearly won. The game continued till move 56 but this sealed it.
Anand thus became the first ever player to win the title 3 times, after his victories in 2005 and 2009. Congratulations again !