#### howandwhy99

##### Adventurer

I understand bounded accuracy in terms of AD&D. It was about having characters in the same scope throughout the game, while still allowing for advancement. A 20-sided die could begin at 50% chance of success and then 9 more levels could each add +1 for the fastest progression rate (like a Fighters Thac0).

For example, At 10th level the fighter has a 95% base chance against a level 1 standard AC. But a 10th level foe would still be balanced accordingly. The key is, never is a 1st or a 10th level challenge an absolute success or absolute failure regardless of class level. Even if ACs below zero still weren't hit with a natural 20 (if you had a Thac0 of 20), you would still get a second roll to see if you hit the fraction of 5% the magical modifiers were giving to the target. (Of course this assumed a bell curve probability assigned atop the die roll's linear results)

Bounded accuracy is a real nice thing to design under, I'm sure. It simplifies everything onto a playable metric. I'm just wondering if they are sticking with the bonuses fitting on a single die, a curvilinear relationship, a linear one, or just what? 30 max DC sounds like +10 bonus linear scaling with 30 as the max for a d20 roll, but I'm not sure.