#game_rule__rule  directions that define the way a game or sport is to be conducted; "he knew the rules of chess"
  supertype:  instruction__direction  a message describing how something is to be done; "he gave directions faster than she could follow them"
  subtype:  ground_rule  a special rule (as in baseball) dealing with situations that arise due to the nature of the playing grounds

No statement uses or specializes game_rule; click here to add one.