pre-game updates

src/pages/rules/basics.md

@@ -25,18 +25,17 @@ Sometimes, dice are rolled. These dice are described by how many sides they have
 
 Simple tasks are assumed to succeed. If the task is dangerous or complicated, roll the dice for an [Ability Check](./adventuring.html#ability-checks).
 
-For most checks, roll a 20-sided die (d20) **at or over** a specified Difficulty Class (DC).
+For most checks, roll a 20-sided die (d20) and add the ability's modifier.
 
--   For harder tasks, add 1-4 to the DC before the die is thrown.
-
--   Some results are special:
-
-    -   A natural 20 represents a critical success: the check automatically succeeds, and often includes a bonus for the roller.
-    -   A natural 1 is a critical failure: the check automatically fails, and the attempt often causes an additional complication or challenge for the roller.
+-   A natural 20 means a critical success: the check succeeds, and often includes a bonus for the roller.
+-   An 11 or higher is a success.
+-   A 6-10 represents a partial success: the check succeeds, but with a potential complication.
+-   A 5 or less is a failure.
+-   A natural 1 means a critical failure: the check fails, and often includes an extra complication.
 
 ### Abilities
 
-Each player character (_PC_) has 6 abilities that help to define how they can interact with the world.
+Each player character (_PC_) has 6 abilities that help to define how they can interact with the world. Each ability has a score from 3 to 18, and each score determines the modifier used when rolling a check for that ability.
 
 -   **Strength (STR)**: Raw physical power, affects melee damage and carrying capacity.