Prolog Predicate在计划中获得4名球员的所有可能组合

Question

这就是我想拥有的（没有事实）而玩家1没有遇到玩家2： -

?- schedule_round(4,X).
X = [game(1, 3, semi_finals), game(2, 4, semi_finals)] ;
X = [game(1, 4, semi_finals), game(2, 3, semi_finals)] ;
false.