Recently, Guillaume Glairon-Mondet made the first repeat of Jan Hojer's Le Marathon de Boissy, ~8C, at Boissy aux Cailles, Fontainebleau. Now there is a video.
This problem traverses in from the left to Le Arête de Boissy assis, ~8B+, and according to Guillaume, it requires power endurance as well as finger strength. At this level, this doesn't surprise me much.
Guillaume, who had already done the ~8B+, needed four sessions to succeed.
Guillaume Glairon-Mondet is sponsored by: adidas, Mad Rock and Snap