Recently Felipe Camargo made the first ascent of Libertadores, ~8B+, at Ouro Preto, Brazil. The problem is most likely the hardest in the country.
The city of Ouro Preto in the Minas Gerais region, roughly 300km north of Rio de Janeiro, is a place full of history. This was a center of the Brazilian gold mining industry in the 17th and 18th centuries. Gold that was mined by slaves and shipped to Portugal.
The boulder is called liberators...because underneath the boulder we found a chain...that they used to hold the slave...
In fact, this is the chain used in the video.
Looks like a really cool, but potentially frustrating, problem! How many times did you fall on the move to the sloper?