Karthikeyan 3rd Indian after Anand, Hari to beat Carlsen

Murali Karthikeyan (Elo 2611) became only the third Indian to beat Magnus Carlsen (Elo 2839) in classical chess. It happened during the seventh round of the Qatar Masters tournament in Doha. And yes, neither Carlsen nor Karthikeyan were wearing an analog watch while playing. But the way the world No. 1 played raised a question of what he ate? Was it food poisoning like in Kazakhstan before the World Cup final against R Praggnanandhaa recently? Or is it with the Swiss League pairing system that have put six Indians against him in seven games? Seems more like playing a series of questionable moves that proved dubious.
Karthikeyan, national champion in 2014 and 2015, won with black pieces in 45 moves of Nimzovich variation in the Ruy Lopez opening.“Happy and exciting to play Magnus for the first in any format and winning,” Karthikeyan told the official webcast. “ I also opted to complicate the position. He had many chances to go for equality but since I had less time on the clock, I guess he wanted to play for more (than a draw) but it backfired. He just gambled.” Only P Harikrishna (2005) and Anand (eight times) among Indians had beaten Carlsen in classical chess previously.