How did 100% chance to-hit w/ Advantage ...miss?

[LevelSix_SYSTEM]

I know there was a lot of fuss when EA first came out & there were some that didn't understand that 95% chance is not 'really' 95% 'if' you have disadvantage but... uhhh...
It literally showed a full 100% WITH advantage, so how the heck did I miss???

[♚︎ Alex]

It’s impossible to have an 100% chance to hit in DnD 5e (most of the time). If I had to guess, the system just approximated the 99.x chance to hit into 100, which is an unfortunate mistake on the part of whoever handled the hit chance display.

[Yojo0o]

I haven't confirmed this specifically in game, but in theory the math checks out if you allow for rounding.

This being a D20 system, if your accuracy totally dwarfs your enemy's AC, you'll hit on anything other than a natural 1 critical miss, so that's 95% accuracy. Advantage means that you roll two dice and take the greater of two values. You can still miss by rolling a 1 on BOTH D20s, which you'd have a .25% chance of doing. A 99.75% chance of success would reasonably round up to 100%, since I don't think the game does decimals.

Profoundly bad luck, but not a bug unless I've missed something.

[LevelSix_SYSTEM]

Originally posted by Yojo0o:

I haven't confirmed this specifically in game, but in theory the math checks out if you allow for rounding.

This being a D20 system, if your accuracy totally dwarfs your enemy's AC, you'll hit on anything other than a natural 1 critical miss, so that's 95% accuracy. Advantage means that you roll two dice and take the greater of two values. You can still miss by rolling a 1 on BOTH D20s, which you'd have a .25% chance of doing. A 99.75% chance of success would reasonably round up to 100%, since I don't think the game does decimals.

Profoundly bad luck, but not a bug unless I've missed something.

Dang, then again...
I guess that was the universe' 're-balancing' cause I think I counted like 5 nat before i got off the nautiloid
Kudos for doin the math, thanks!

[SnarkOne]

It might be a bug in how they show the percentages for the rolls for attack. Rolling a 1 is a definitive miss, rolling two 1s with advantage should initiate the phase of adding your modifiers to the rolls. You can still miss with this & probably will.
Don't trust the percentages, trust the dice rolls. Check the combat log, it should tell you why you missed.

I suggest playing with Weighted dice to avoid these 'inconsistencies' of percentages shown.

[Yojo0o]

Originally posted by SnarkOne:

It might be a bug in how they show the percentages for the rolls for attack. Rolling a 1 is a definitive miss, rolling two 1s with advantage should initiate the phase of adding your modifiers to the rolls. You can still miss with this & probably will.
Don't trust the percentages, trust the dice rolls. Check the combat log, it should tell you why you missed.

I suggest playing with Weighted dice to avoid these 'inconsistencies' of percentages shown.

Unless I'm missing something, that's not accurate. Nat 1 is a critical miss on an attack roll. Advantage just gives you a second die, but doesn't change the rules of what a nat 1 means. If you roll double-1s with advantage, that's a critical miss, no modifiers to consider.

[Pan Darius Cassandra]

Because 1's always miss and 20's always hit. Technically, you can never get higher than a 95% chance to hit, the game just doesn't reflect this fact.

[SnarkOne]

Originally posted by Yojo0o:

Originally posted by SnarkOne:

It might be a bug in how they show the percentages for the rolls for attack. Rolling a 1 is a definitive miss, rolling two 1s with advantage should initiate the phase of adding your modifiers to the rolls. You can still miss with this & probably will.
Don't trust the percentages, trust the dice rolls. Check the combat log, it should tell you why you missed.

I suggest playing with Weighted dice to avoid these 'inconsistencies' of percentages shown.

Unless I'm missing something, that's not accurate. Nat 1 is a critical miss on an attack roll. Advantage just gives you a second die, but doesn't change the rules of what a nat 1 means. If you roll double-1s with advantage, that's a critical miss, no modifiers to consider.

You're probably right. I'm going off what I've seen happen when rolling two 1s with advantage in conversation, twice, & once on stealing.
However, the game may calculate the attack rolls the same, despite what may be in the D&D manual.

Of course I haven't tested this due to the small chance of it happening in-game (rolling two 1s with advantage on attack never happened to me) & I don't have the code for how the attack roll system is calculated.

[Yojo0o]

Well, to be clear, crit success/failure doesn't apply to ability checks and skill checks, only to attack rolls. In conversations and stealing, modifiers certainly would still apply, regardless of advantage/disadvantage.

[LevelSix_SYSTEM]

Oh, not sure if this matters but it was for the Cleric cantrip Sacred 'whiff'(Flame), so seeing the 100% was weird to begin with, but not sure if the 'save' to as spell works different than the normal 'crit hit'/'crit fall' 5% chance of each
& I had Stealth & High Ground, know Advantage doesn't stack 'but' it did show the +2 showing I had two sources of it

[Pan Darius Cassandra]

Advantage doesn't matter for spells that are save throws like Sacred Flame because they aren't attack rolls.

[LevelSix_SYSTEM]

Originally posted by pandariuskairos:

Advantage doesn't matter for spells that are save throws like Sacred Flame because they aren't attack rolls.

Oh, could that be an oversight that the Advantage window shows up then?

[SnarkOne]

Originally posted by Yojo0o:

Well, to be clear, crit success/failure doesn't apply to ability checks and skill checks, only to attack rolls. In conversations and stealing, modifiers certainly would still apply, regardless of advantage/disadvantage.

I can still fail a sleight of hand for a roll of a 9 when I have a +8 modifier with Astarion. Infact, I just tested it...
And rolling a 1 in conversation without advantage/disadvantage is an auto-fail, even when the target is 0 on the ilithid tadpole powers. Regardless of modifiers. Also just tested...

The game has a different system of calculating the rolls right now, I'm just saying it might extend into the attack roll system. Which makes it the same as the ability checks.

There's unique conversations for failed ilithid tadpole powers, which are kinda funny.

[♚︎ Alex]

Originally posted by pandariuskairos:

Because 1's always miss and 20's always hit. Technically, you can never get higher than a 95% chance to hit, the game just doesn't reflect this fact.

You can with things like Trance of Order. It’s not really relevant to this thread, but it’s technically possible to get 100% hit chance through things like that.

[LevelSix_SYSTEM]

Originally posted by Alex474:

Originally posted by pandariuskairos:

Because 1's always miss and 20's always hit. Technically, you can never get higher than a 95% chance to hit, the game just doesn't reflect this fact.

You can with things like Trance of Order. It’s not really relevant to this thread, but it’s technically possible to get 100% hit chance through things like that.

Wait isn't that Unearthed Arcana?
That isn't implemented yet is it, did someone hammer out a mod that adds Clockwork?

[♚︎ Alex]

Originally posted by LevelSix_SYSTEM:

Wait isn't that Unearthed Arcana?
That isn't implemented yet is it, did someone hammer out a mod that adds Clockwork? :zagpls:

They added Clockwork and Abberant Mind officially in Tasha’s, as far as 5e is concerned. There are mods for it for BG3, but you don’t get high level abilities like trance.