this post was submitted on 03 Jan 2024
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[–] jounniy@ttrpg.network 1 points 10 months ago* (last edited 10 months ago) (1 children)

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

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

[–] myrrh@ttrpg.network 2 points 10 months ago* (last edited 10 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...