[justinator]

At least in bouldering, John Gill proposed the, "B" scale, which measured basically how many people were able to top the problem. So if you established a climb, it gets a grade of, "B1", until another person gets sends it "B2". This scale basically favors the hardest problems being the most important, and adjusts the grade of the climbs, as the "sport" progresses.

Gill was a Math professor, so this is somewhat interesting to the discussion. He famously thought of boulders as, "problems", of course.