 He left the route ungraded, saying only that it was 'harder than Rhapsody'.Many climbers consider such high grades provisional, as the climbs have not yet been achieved on-sight/ground-up.The grade "XS" (occasionally qualified by Mild [MXS] and Hard [HXS]) is sometimes used for eXtremely Severe rock climbs when a high proportion of the challenge is due to objective dangers, typically loose or crumbling rock, rather than technical difficulty.