This system ranges from 4 to 8C (the equivalent of V15 or B15), and was, as the name reveals, first devised in the Fountainebleau forests in France, but is now widely used also in other bouldering areas around the world.
This system ranges from 1a to 8c (the equivalent of V15 or B15), it is rare to find problems easier than 2b. The system was first devised to classify the sandstone climbing in the Fountainebleau forests in France, but is now widely used also in other bouldering areas around the world.