Igor Levit will perform Erik Satie's 'Vexations' 840 times in a near day-long event at London's Southbank Centre. The piece, written in 1893, lacks clear performance instructions and is known for its endurance challenge. Levit's performance, expected to last 16-20 hours, follows previous renditions by other pianists, including John Cage and Aaron D. Smith. Marina Abramović will direct the performance, which aims to create a new experience for the audience.