Magnus Carlsen, one of the greatest chess players of all time, achieved a significant victory at the London Chess Classic in 2012. However, the victory was nearly jeopardized by an all-night drinking session with his friends before the game. Carlsen, who is known for his focus and dedication, recounts his experience of playing against British Grandmaster Luke McShane in a podcast. In this game, Carlsen was completely hungover and struggled to get his thought pattern going, with McShane close to winning. Carlsen took a risky variant, and McShane blundered on move 27, leading Carlsen to win the game eventually. This article discusses the impact of the all-night drinking session on Carlsen's game and his success in the tournament.