Bob Barber has been playing Go for 30 years. He has directed 65 quarterly tournaments in Chicago and was Director of the 18th U.S. Go Congress in 2002. He is an amateur 1 dan.
Mark Rubenstein has been playing Go for 15 years. Before that, he played what he thought was Go but was really just random nonsense. He is the president of the Evanston Go Club and Membership Services Coordinator for the American Go Association.