OIM 2008 Problem 6
Biribol is a game played between two teams of 4 people each (teams are not fixed). Find all the possible values of for which it is possible to arrange a tournament with players in such a way that every couple of people plays a match in opposite teams exactly once.
Dataset text AI-MO AoPS. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
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