I have a List with Integers and anonymous variables and I try to find the index of a special values. Problem is as soon I'm using nth1/3 to find the indices Prolog assigns values to the anonymous variables and therefore I find way too indices.
Example:
List = [1,\_,1], where I want as result X = 1, X = 3 from nth1(X,List,1), but as stated before I get X = 1, X = 2, X = 3.