User Tools

Site Tools



  • Gain experience with logic programming.
  • Become familiar with Prolog.
  • Gain understanding of the declarative nature of prolog.


For this class, we use SWI-Prolog. You can download binaries for a Windows or macOS system here.

Also, there is an unofficial tutorial for installation here.

For Mac with Homebrew installed, you can do this command (info here):

brew install swi-prolog

For Ubuntu, you can do these commands:

sudo add-apt-repository ppa:swi-prolog/stable
sudo apt-get update
sudo apt-get install swi-prolog


You will turn in two prolog programs (in separate files) that solve the following logic puzzles:

To help you start, we've provided a sample solution to It's a tie. Use this as a model for your own solutions.


  • Just copy and paste the all_different function. It simply checks to make sure each item in the list is unique.
  • Check spelling errors. There is no such thing as misspelled atoms. So speigel and spiegel are both valid but different.
  • Once you have a solution, just check whether it satisfies each of the numbered rules in the problem.
  • These problems make extensive use of the “not” operator, \+.
    • \+ works as you expect when all variables are completely bound.
    • If E contains unbound variables, \+E will try to find bindings to that will make E true. If Successful \+ will fail.
  • This lab is taken from this site. There may be additional resources there.
sc330_f2016/prolog1.txt · Last modified: 2017/03/06 17:01 by dhart