Dex vs. AC

[muffin_of_chaos]

Sorry, obvious question that I must ask:

When a power is a melee attack that says that the to-hit roll is "Dex vs. AC," does that mean that one makes a standard melee attack roll and substitutes dexterity for strength? Or is it just a dexterity roll?

I missed the answer somehow.

 

[Cirex]

You use the dexterity type of attack, like if using a ranged weapon or a melee weapon with "weapon finesse"*.

*I know it doesn't exist at 4e, just trying to explain myself.

 

[baberg]

As I understand it, you would roll d20, add your Dexterity modifier (not Dexterity score) and if the result is greater than your target's AC then you hit.

EDIT: As somebody below has corrected, you also add 1/2 your level rounded down as always

 

[muffin_of_chaos]

You use the dexterity type of attack, like if using a ranged weapon or a melee weapon with "weapon finesse"*.

All right, thanks!

 

[mmu1]

"Just a Dexterity roll", but in 4E that means 1d20 + 1/2 character level + Dex mod.

 

[muffin_of_chaos]

Heh, I'm getting two different answers.

I think Cirex is right because otherwise there'd be no point in weapon proficiencies for a Rogue, eh?

I think they need to make it less vague.

 

[Scalding]

I think you should also add the weapon's accuracy modifier as appropriate. A sword might have an accuracy modifier of +3, for example.

So that's 1d20 + 1/2 character level + dex mod + weapon accuracy.

 

[mach1.9pants]

I think they need to make it less vague.

I would imagine that the correct method of making attack rolls might, just might get a mention in the PHB and therefore would be perfectly clear. Instead of what people are guessing/interpolating/interpreting from a few excerpts
But all attack rolls have a unified mechanic, based on one of the six ability scores. So far it is thought to be

(1D20+) Underlying Ability Modifier + 1/2 Level

and as all DnD stuff you need to add any relevant modifiers such as feats, situation, etc.

I think Cirex is right because otherwise there'd be no point in weapon proficiencies for a Rogue, eh?

When you are proficient in a weapon you get to add a bonus to your attack roll of +1 to +3 (depending on the weapon).
Hope that helps, have read through the Pre-release rules compilation and that answers a lot of questions.

 

[Boarstorm]

It says "Dex vs. AC", not "Melee vs. AC, modified by your dexterity."

Ergo, I'm with mmu1, as opposed to Cirex.

 

[mach1.9pants]

Ergo, I'm with mmu1, as opposed to Cirex.

Umm as far as I can see they are both saying the same thing!
1d20 +1/2 per level +Dex mod (+relevant other modifiers; feats etc)