The early Danish football championships were decided in a single game, and the competition was not nationwide until its structure was altered before the 1927–28 season.
Kjøbenhavns Boldklub (KB) thus won 12 of its shared record 15 Danish championships before the 1954–55 season, when Køge Boldklub became the first non-Copenhagen team to be crowned Danish football champions.
Through to 1927, the championship was decided in a single final match,[1] with the winner of KBU's Copenhagen football championship directly qualified to play the winner of a series of play-off games between the regional champions from the rest of Denmark.
[1] During the German occupation of Denmark in World War II from 1940 to 1945, the championship was again decided in a single final.
[1] The format varied throughout the occupation, as a differing number of teams played in three separate tournaments.
From the 1945–46 season, the competition reverted to the "Championship League" format, with the tournament now named the "1st Division".
[3] The 1953–54 season saw the first non-Copenhagen team win the Danish championship, when Køge Boldklub won the title.
[4] The championship title was not reclaimed by a Copenhagen team in more than ten years, until Akademisk Boldklub (AB) won the 1967 season.
From 1958, the Danish championship was arranged through one calendar year,[1] and the 1956–57 season lasted 18 months with the teams playing each other thrice for a 27 games total.