Contests
Sometimes one character’s or monster’s efforts are directly apposed to another’s. This can occur when both of them are trying to do the same thing and only one can succeed, such as attempting to snatch up a magic ring that has fallen on the floor. This situation also applies when one of them is trying to prevent the other one from accomplishing a goal. For example, when a monster tries to force open a door that an adventurer is holding dosed. In situations like these, the outcome is determined by a special form of ability check, called a contest.
The active participant in the contest makes an ability check appropriate to their efforts. They apply all appropriate bonuses and penalties, but they compare the DC total with a DC of 10+ the other participant’s equivalent modifier. The participant with the higher total wins the contest. That character or monster either succeeds at the action or prevents the other one from succeeding.
If the contest results in a tie, the situation remains the same as it was before the contest. Thus, one contestant might win the contest by default. If two characters tie in a contest to snatch a ring off the floor, neither character grabs it. In a contest between a monster trying to open a door and an adventurer trying to keep the door dosed, a tie means that the door remains shut.