I read Peter Norvig's excellent Paradigms of Artificial Intelligence Programming book when I first started learning Lisp last year. This book includes an excellent chapter on implementing the game of Othello®. For learning purposes, I reworked to the code to add significant optimizations and a CLIM-based graphical user interface.
I noticed this week that Peter has posted a liberal license for his code from his books. So, I packaged up my version and have published it at http://reversi.b9.com/.
