from the introduction:
This is a combat flowchart for AD&D 1 st Edition, by the book. It attempts to include all the rules in the three core rule books (PHB, DMG, MM).

I think everybody ignores some of these rules in their AD&D game. I wondered if it was possible to include all of them in a game, when I joined a campaign that attempted to play AD&D strictly by‐the‐book. I created this flowchart to see how all the combat rules fit together, to see if it’s possible to play through combat with all the rules, and what that might look like.

I admit it looks nuts.