A Stroke of Brilliance: Matthew Huddleston’s Proof

In February 2008, I sent the manuscript of The Mathematical Coloring Book to Springer. At about the same time, the Problems Section of the American Mathematical Monthly published the solution [OTH] of our interest here. I read it and was amazed at the Olympiad-like beauty of the short Matthew Huddleston’s solution of the part C of the problem proposed by Jim Owings. (It seems, no one else solved part C of the problem, including the proposer.) I have got to share it with you, for beauty is a rare commodity on our planet. Note that it appeared BG, i.e., Before de Grey, a whole 10 years before.