rules of the game, n.All

The Rules of the game (n.) are ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the arrangement by which one side may attack anywhere and the other may answer only on its own ground; break them and you are the aggressor.