With experience, the chess beginner learns to recognize overextended positions and how to avoid them. Similarly, she begins to recognize such situational aspects of positions as a weakened king’s side or a strong pawn structure, despite the lack of precise and situation-free definitions. The player can then follow maxims such as: attack a weakened king’s side. Unlike a rule, a maxim requires that one already have some understanding of the domain to which the maxim applies.