““Relative Difficulty and Power Provided You cannot determine how the player perceives the difficulty of a challenge through absolute difficulty alone. You must also take into account two more factors. The first is the amount of power that the game gives to the player to meet the challenge. Power provided measures, by means appropriate to the situation, the player’s strength: the health and powers of his avatar, the size and makeup of his army, the performance characteristics of his racing car, or whatever factors apply. In the simple example described in the previous section, power provided would refer to the amount of damage the avatar can do when hitting the enemy and the avatar’s resistance to damage: the number of health points that he has to lose before dying.””
