Anand vs Carlsen chess position

The ninth game of the World Championship match in Chennai was Carlsen’s third and decisive victory, after which he won the match and became the 16th World Chess Champion. Black has two queens but is under attack and needs to be precise.
28… Qe1! (not 28… Qd1? because of 29. Rh4 Qh5 30. Rxh5 gxh5 31. Ne3, and White is winning). White resigned because after 29. Rh4 Qxh4 30. Qxh4 Qa5, Black is completely winning.