The Parry skill is checked during combat to determine whether an attack can be fully blocked. Melee and archery attacks can be fully parried if the defender is using a Shield or Melee weapon. On a successful parry, the attacker will miss completely.

Chance to Block an Attack
FORMULA: Base % Chance of Blocking with a shield = Parrying Skill * 0.3 Base % Chance of Blocking with a melee weapon = Parrying Skill * 0.15
Parrying	% Chance of Blocking with Shield	% Chance of Blocking with Melee Weapon
5	1.5%	0.75%
25	7.5%	3.75%
50	15%	7.5%
75	22.5%	11.25%
100	30%	15%
120	36%	18%