https://www.reddit.com/r/osr/comments/axa603/descending_ac_and_thaco_converter/
Subtract AC from 20, and you get ascending AC (If a monster has AC 4, then it's 16 AC for ascending)
For THAC0: subtract the roll needed to hit from 20 = your attack bonus (If a fighter hits AC 0 on a 19, then it's 20-19= 1; so +1 attack bonus)
Obviously, different games have tweaks to these sums, but overall this rough layout has been mostly accurate with converting on the fly
No comments:
Post a Comment