

So when walking into the Wizengamot and trying to talk circles around the gathering, a GM might find it appropriate to ask for an Intelligence-based intimidation check. (And for many GMs they're the only ones that ever do.) If you read chapter 7 carefully you'll see that what we're describing aren't skill checks, but are ability checks to which a skill proficiency might be applied. Skills aren't uniquely tied to the ability listed on the sheet or in that chart those are simply the most common abilities that invoke those skills. * - Okay, it's actually a bit more than that. (Jack of all Trades kicks in at level 2, and I'm still assuming level 1) You have not mentioned being a rogue with expertise applied to Stealth, so I'll assume no other modifiers. You are proficient and (assuming you're starting this character at level 1) have a proficiency bonus of +2 Their impact on skill modifiers is described in their respective class descriptions. Other modifiers: you might pick up some other modification, the most commonly Rogues' "expertise" or Bards' "Jack of all Trades" class features. You obtain skill proficiencies from your class, from your background, and possibly from downtime activities. Proficiency bonus (if applicable): if you are proficient in the skill, then you also add your proficiency modifier to the skill modifier. * Your skill modifier has, as one component, that ability’s modifier. Relevant ability modifier: each skill usage is associated with an ability you can find which either in tiny letters next to the skill on a WotC character sheet or in a chart on PHB p.174.

What follows is a distillation of much of Chapter 7 of the PHB, "Using Ability Scores" Skill modifier = relevant ability modifier + proficiency bonus (if proficient) + other modifiers
