Guillaume Glairon Mondet has made the first ascent of Le Pied à Coulisse, the direct exit to Chaos, at Rocher Gréau, Fontainebleau. Guillaume suggests 8C+ which would make it the hardest in Fontainebleau and a contender for the hardest anywhere.
For some reason, Charming Crack comes to mind (from the decades old detritus of memory). After I'd ground to a painful halt, my mate Boggie soloed it three times in a row. Bloody Yorkshiremen! I sulked and planned vengeance.
P.S. f8C+ in Font - I'm guessing things have moved on considerably. Charming Crack, eat your sodding heart out.