Leagues can
be either "set" leagues or "flex" leagues.
Set leagues require players to play the assigned
opponent(s)
in a specified lobby at the scheduled day/time each week.
Flex leagues allow players to play their assigned games at any
time during the week that can be agreed upon by the two players/teams, up
to a scheduled cut-off time. Games in a flex league that are not
played by the specified cut-off will be played at the scheduled day/time.