PETER D. SCHUMER, PhD, is a professor of mathematics at Middlebury College, Middlebury, Vermont. Dr. Schumer is a well-known writer and lecturer as well as a popular educator on both mathematics and the game of go–and a recipient of the Trevor Evans Award of the Mathematical Association of America. He received his PhD in 1983 from the University of Maryland and has been a visiting scholar at Stanford, UC Berkeley, UC San Diego, and Keio University in Japan.