Prolog normally finds a solution, and if you decline it, a new solution, and so on until it can't find any more solutions. If you pay careful attention to your

Prolog normally finds a solution, and if you decline it, a new solution, and so on until it can't find any more solutions. If you pay careful attention to your program, you can make it so that it finds ones that satisfy soft constraints first, and then solutions that don't satisfy them. This is what the replies in [0] suggested. Prolog isn't exactly intended for preferring some solutions over others, but it has predictable solution generation that can be used to prescribe priority. That's a lot of mental work, but the code is succinct. If you want to get by without flow diagrams, your best bet is to generate and optimize a cost function, and that can be done in any language.