I'm a new DM (my party just finished the Lost Mines of Phandelver and I'm homebrewing a Skyrim campaign) and was wondering about Advantage and Disadvantage.
Is there ever a situation where a player would roll only 1d20 instead of the normal 2d20 for a check? Like could something happen where they don't have advantage or disadvantage, just normal circumstances. If not, how do you tell if a situation has advantage over disadvantage.
For example: The party came up to a house and the Paladin, while riding his tiger steed, decided to ram the door with the tiger(wanted him to roll more than a 10 to break it). Nothing was hindering him, the door wasn't gonna move out of the way, door wasn't reinforced or anything, weather was perfect, etc. Would he just roll 1d20 to beat my DC10, or would he roll 2d20 and I as DM decide if he has advantage or not?
(BTW he rolled a 2 and 5, knocked his tiger out for a couple rounds xD).
Best Answer
"Neither advantage nor disadvantage" is the normal ability check.
A normal/typical ability check is rolled with 1d20 (modified for Proficiency and Ability scores). It takes "something extra being involved" for an ability check to accrue advantage or disadvantage. (Spell effects, class features, conditions, etc).
An ability check with advantage is rolled with 2d20, take the highest one.
Example: Ranger. (Class feature Favored Enemy)
An ability check with disadvantage is rolled with 2d20, take the lowest one.
There are a variety of things which will cause disadvantage on an ability check, such as a level of exhaustion.
Those are the three cases of ability checks: normal, with advantage, with disadvantage.
Trying to create advantage
Whenever the party/players use the "help" action (working together) an ability check can be made with advantage.
Working Together (Sub category of Using Ability Scores)
Where it makes sense
You as DM can, whenever you feel that the circumstances warrant it, apply either advantage or disadvantage based on what the character is trying to do, and what judge makes it easier or harder to achieve based on their situation and their description of the attempt. (from Advantage and Disadvantage)