Let's see if this is right: (I'm really HORRIBLE at math)
You hit the target IF
Your dice roll > Your THAC0 - Enemy Armour class
You miss the target IF
Your dice roll < Your THAC0 - Enemy Armour Class
Now since a plus 2 weapon makes it easier to hit than a plain old weapon -
You hit IF
Your dice roll plus 2 > Your THAC0 - Enemy Armour Class
Would that be right?
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