Create pools with your friends, co-workers, schoolmates, etc. or with people who share affinities and compete with them to prove who knows more.
Each pool has its own ranking and you can choose the specific leagues in which you want your pool to compete. You can make your group public or private, and challenge your friends with whom you want to participate.
Create them in any of these options: Exact result, Hit percentage or Yield (rentability of your forecast).
Join any of the existing public groups.