Boulders

Each boulder has a fitted zone and top competition grade and a spammability, how readily climbers keep re-attempting it. Power boulders sit low (few tries possible); coordination boulders sit high (spammable). Difficulty and spammability are nearly independent. Point = a boulder, x = top competition grade, y = spammability, size = how many topped, colour = round. Spammability is also what converts the model's per-attempt difficulty into a per-session competition grade (see methodology).