The Dueling Board is an essential part of the training in Chinese Boxing.  After developing proper responses and instincts, the dueling board provides a testing ground.  Duels can be at all levels with all kinds of limits and at all speeds.  It should be done in a progressive way, friendly to learning.  Since Chinese Boxing has no rules, a successful fight will cause significant harm to an opponent.  If one is to duel, then safety factors have to be done to allow a life of healthy practice.  This dilemma is one of the great challenges in the CBII curriculum and work.  We use all kinds of duels, but we use internal arts dueling, Wing Chun Chi Sao, and various types of sparring dueling.