Armor as a weapon

Originally, in this post, I explained a small modification to the known AC system used in D&D up to advanced second edition. My goal was to reintroduce something that was lost when the game migrated from wargaming to RPG, but then, as a final afterthought, I made some calculations and discovered that, well, my changes made little (although not insignificant) difference. Preceding a post with a disclaimer like “what you are going to read may not be as useful as it seems” is probably not the best hook, but I still believe there are a few interesting bits here and I may also have unwillingly solved an ancient argument about AC vs. damage reduction that sometimes still rises from its grave (spoiler: there is surprisingly little difference in the long run unless you make a completely different system from scratch.) Besides, I’m a believer in the idea of publishing negative results, even if they are not as eye-catching as positive ones.

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