I have not used it for anything outside of learning, yet. I highly recommend the book Thinking as Computation. It's a really excellent introduction to both Prolog and the subject of the title. It presents Prolog solutions to many topics. For example, there's some game solvers, and the Prolog programs basically consist of writing down the rules of the game.
I do have some ideas for some apps I'd like to tackle at some point. Those primarily consist of interacting with system constraints.
I do have some ideas for some apps I'd like to tackle at some point. Those primarily consist of interacting with system constraints.