It was a move that included a concealed trap, since the most natural move in the world was:
as suggested by our commentators, but it turns out that loses almost on the spot to
Before the rest day at the Tata Steel Masters, Carlsen had lost to Anish Giri, and in the very next round, he was shockingly defeated by 18-year-old Nodirbek Abdusattorov. The last time Carlsen had lost two classical games in a row was in 2015, at the Norway Chess event, where he lost to Veselin Topalov and Fabiano Caruana in the first two rounds of the super-tournament.
Parham Maghsoodloo bounced back from his loss against Abdusattorov by taking down a Jorden van Foreest in shaky form, while Levon Aronian grabbed his first victory of the event in his game with white against Vincent Keymer.
A mistake by Carlsen that costs him the game. He should have played 44.Kh3 to put up more stubborn resistance.