It is a special form of the round-robin tournament in which, however, only the first-placed player against the second-placed player, the third-placed player against the fourth-placed player, etc. The advantage of this type of tournament is that participants always play about the same strength against each other and that, compared to the round-robin tournament, far fewer games have to be played in order to obtain a meaningful ranking list.
However, the Danish system does not provide an exact placement for the midfield. In return, it saves the spectators games, the results of which are foreseeable due to the different playing levels.
It differs from the Swiss system in that it does not prevent the same players from clashing several times.