There used to be an index here of all the challenges and their respective difficulty. It was easy for me to use. The macros that replaced it does not function properly for me, and I cannot find the source data that uses the original index. Has it moved somewhere else?
@Alekh there was a challenge with the data, so the workflows that included the data were removed. Those of us whose solutions were deleted were informed as such, and the deletion won't affect the total number of challenges completed.
I for one will redo the challenge. Because it's always good to practice.