spotted small mistakes in the “conversion guide” for monsters.
It says
A monster’s +Attack can be found by subtracting its THAC0 from 20, rounded up (THAC0 - 20 = +Attack)
First of all, if there’s no division, there won’t be any need to round the result up or down. Secondly, if you follow the formula, you’ll end up a negative result most of the time. I think you meant “20 - THAC0 = +Attack”
what do you think?