• jounniy@ttrpg.network
    link
    fedilink
    arrow-up
    1
    ·
    edit-2
    11 months ago

    Hm. That could work. But it would be quite tedious.

    Also: why 12 and not 8? Doesn’t a DC calculate 8+prof+ability?

    • ...m...@ttrpg.network
      link
      fedilink
      arrow-up
      2
      ·
      edit-2
      11 months ago

      …subtracting twelve maintains the same odds with ties ‘succeeding’ for the rolling adversary; some DMs instead subtract eleven and flip ties for the PC to always win, which is mathematically identical, but then you have to keep track of flipping tie-resolution back-and-forth depending upon who’s rolling…

      Perception +6, Trap DC 14 = Passive Perception 16, Trap +2
      (both have the same 65% chance of detection, 35% chance of staying hidden)

      …it becomes a pretty trivial exercise to invert any roll after you’ve done it once or twice…