The odds of a player of Niemann's lower rank defeating the high-ranking Carlsen twice with the black pieces is estimated to be only 1 in 2,500. In addition, in the game at the Sinquefield Cup prior to his reported victory over Carlsen, Niemann was far behind on time but made a string of perfect moves to improbably defeat the #14 player in the world, [[Shakhriyar Mamedyarov]]. The [[Saint Louis Chess Club]] had refused a request by the #2 player in the world, Ian "Nepo" Nepomniachtchi, for tighter security against possible cheating by Niemann.<ref>https://new.chess24.com/en/wall/news/nepo-asked-for-extra-measures-against-niemann-in-st-louis</ref> Then, after tighter security measures were finally installed by the chess club, Niemann was unable to win another game. | The odds of a player of Niemann's lower rank defeating the high-ranking Carlsen twice with the black pieces is estimated to be only 1 in 2,500. In addition, in the game at the Sinquefield Cup prior to his reported victory over Carlsen, Niemann was far behind on time but made a string of perfect moves to improbably defeat the #14 player in the world, [[Shakhriyar Mamedyarov]]. The [[Saint Louis Chess Club]] had refused a request by the #2 player in the world, Ian "Nepo" Nepomniachtchi, for tighter security against possible cheating by Niemann.<ref>https://new.chess24.com/en/wall/news/nepo-asked-for-extra-measures-against-niemann-in-st-louis</ref> Then, after tighter security measures were finally installed by the chess club, Niemann was unable to win another game. |