These divisions were round-robin tournaments that included football clubs that were founded in different geographic areas.
Two of the clubs qualified directly for the second round (the semi-final stage) and the other four had to play two quarter-final matches.
The championship was a knockout tournament featuring clubs that had finished at the top of six regional divisions.
Ludogorets Razgrad are third; the team is currently in a streak of 13 consecutive titles, which is a record in Bulgarian football.
Slavia Sofia is in fourth place, with seven titles, six of which were won before the Second World War.