Last year, during ACM'70 in New York, the First United States Computer Chess Championship was held. Six programs competed, with Northwestern University's CHESS 3.0 winning the tournament. This year at ACM'71, the Second Annual Computer Chess Championship and a panel of the programs' authors are scheduled. At the time of this writing, there are six programs entered in the tournament. Presented below are short summaries of authors' panel presentations, giving some details of their programs and discussing techniques for developing more effective chess playing programs. Mr. David Levy, an international chess master from the University of Glasgow, is the tournament director for the chess championship and a discussant during the panel.