Well, here's a quick rundown:
18 steps to combat in Dungeons and Dragons.
4 initial steps (determined once at the beginning of combat).
Each combatant must take up to 14 steps to resolve their turn.
Each of the 14 combat steps has up to 7 sources for modifiers.
Each source may have multiple "types" of modifiers, which may or may not apply, depending upon the "stacking" rules for types of modifiers.
Each source has a modifier "range" from -9 to +25.
Just add them all up, multiply when necessary, and conduct probability rolls to determine the outcome of each of the 14 steps, for each combatant, until the combat is resolved.
Simple.
18 steps to combat in Dungeons and Dragons.
4 initial steps (determined once at the beginning of combat).
Each combatant must take up to 14 steps to resolve their turn.
Each of the 14 combat steps has up to 7 sources for modifiers.
Each source may have multiple "types" of modifiers, which may or may not apply, depending upon the "stacking" rules for types of modifiers.
Each source has a modifier "range" from -9 to +25.
Just add them all up, multiply when necessary, and conduct probability rolls to determine the outcome of each of the 14 steps, for each combatant, until the combat is resolved.
Simple.