Editing Open4E: Core Mechanic (section)

==Saving Throws==
Most rolls that you make are against a specific DC - either an attack vs. a creature’s defense, or a skill check against a specific difficulty. Sometimes, however, you need to make a roll in opposition to another roll that was made. These rolls are called saving throws. To make a saving throw, roll your skill, proficiency or ability modifier vs. the original roll’s check result, as if it was a DC. When you perform an action against another character that they can save against, write down your check result in case that creature later attempts to make a saving throw against your action.