Lanefan
Victoria Rules
Good summary.So, there are basically 4 places we could block any given action in a roleplaying game:
There's times when all four block points come into play:Typically, in most traditional games, actions are only really blocked at either the execution stage or the effect stage. The notable exception here are games like Vampire where you might have to roll Self Control to stop from feeding on an innocent (intent) or Courage to walk closer to a fireplace (initiation).
Intent - you want to do something but you're prevented before you start by internal (e.g. alignment, vows) or external (e.g. laws, physical restraint) considerations.
Initiation - you set out to do something blatantly impossible such as jump to the moon or build a nuclear bomb out of paper clips, and get summarily shut down.
Execution - you fail at a task or action at which you could have succeeded (this is the most common block point)
Effect - you succeed at the task or action but something makes it either redundant (while you were picking the door lock another PC already got in through an open window) or counterproductive (the "third guard on the left" you just shot dead was actually the captive prince - disguised by his captors - you came here to rescue). Probably the least common block point.
And really, any of these can be used to deny agency if done wrongly; my captive prince example would probably be one such.