“As you will soon see, Patrick has investigated many nooks and crannies in his pursuit of interesting material…With so much to choose from, it would be difficult to name my favorite, but at the moment I’d single out “Duncical ACAAN,” a whimsical (and surprisingly sensible) version of that popular plot, the latest development of an approach that Patrick has been working on since 2003. He has published earlier solutions; I like this more.”

Max Maven