Carlsen’s previous defeat in classical chess came against Shakhriyar Mamedyarov in July 2018.
“It had to happen at some point,” the Norwegian said of the defeat. “But in any case, it’s very, very disappointing.”
“I’m really happy, obviously, I didn’t expect to win this game at all,” Duda told chess24.
“I wasn’t very happy with my play so I thought losing to Magnus is nothing terrible at all. That was relaxing me, (thinking) okay, it’s not a big deal considering the games I played earlier in this tournament.”
Revenge came swiftly for Carlsen. In the sixth round, he faced Duda again and this time defeated his opponent in 26 moves.
Norway Chess, which runs from October 5 to 16 in the city of Stavanger, is the first elite-level in-person tournament since competitions moved online amid the coronavirus pandemic.