|Middle Class Wall
Climb Overtime then Black Eye In The Sky in one long pitch exercising creative use of long draws. Probably can't really give it a harder grade than 12b but it most definitely feels harder than it does climbing it in 2 pitches. A 70m rope is just long enough to lower from the top anchor down to the middle one if you don't want to mess with tagging a line or belaying at the top.
See the photo on the Middle Class page and the descriptions for Overtime and Black Eye In The Sky.
19 bolts to chains.