Someone organized a tournament of iterated prisoner's dilemma with access to the opponent's source code. Can't seem to find examples of anyone trying this with

Someone organized a tournament of iterated prisoner's dilemma with access to the opponent's source code. Can't seem to find examples of anyone trying this with chess on google. http://lesswrong.com/lw/hmx/prisoners_dilemma_with_visible_source_code/ http://lesswrong.com/lw/hmx/prisoners_dilemma_with_visible_s...