Evasion and Miss

[Black Isle]

• Fundamentals!
• Sources of Evasion and Miss
• Calculations/Stacking

Evasion and Miss
6.72

There are couple of reasons make a unit to fail it's attack, miss is one of them. Missed attack won't damage the target, won't place buffs. Simply won't hit. We can assume that projectiles don't reach the target for ranged units.

If an attack missed its target or evaded, this doesn't affect attacker in terms of actions. Attacker will simply play animations, will lose mana or health if using an auto-cast attack ability, so on.

Projectiles that miss, won't homing the target even if they do otherwise. If a ranged unit with splash attack misses the target, the projectile will damage the area and place buffs. Where the target was when the projectile is released.

Assume a Dragon Knight in Level 3 Elder Dragon form is attacking a Hero with evasion. If he doesn't miss the projectile will homing the target hero and hit him even if he moves further away from Dragon Knight. If he misses the projectile will go to the location where the target hero was when dragon knight reaches his attack point so,
If target hero moves away he will not be affected by the attack.
If target hero doesn't leave the area, he will be damaged for the splash damage and will obtain frost buff.
Values of Blue Dragon's splash attack AoE:
Full Damage Area: 75
Half Damage Area: 150
Quarter Damage Area: 250

Ranged units' attacks, with bounce weapon type, will not bounce to other units if missed. Only Luna Moonfang uses this weapon type in DotA.

Ranged units with artillery weapon type never miss ( no unit in DotA uses this type ) as they attack the location of the target unit, ( or the approximate location where target will be depending on movement speed, if it's moving ) instead of unit itself.

Evasion doesn't follow Pseudo Random Distribution.
Missed attacks don't increase the counter of Pseudo Random Distribution.
Refer to Pseudo Random Distribution Article for further explanation.

Sources of Evasion and Miss

Evasion Abilities

Drunken Brawler
% Chance to Evade: 6/12/18/24

Blur
% Chance to Evade: 15/20/25/30

Windrunner
% Chance to Evade: 100

Talisman of Evasion
% Chance to Evade: 25

The Butterfly
% Chance to Evade: 30

Miss Abilities

Blind
% Chance to miss: 20/28/36/44

Blinding Light*
% Chance to miss: 80

Crippling Fear*
% Chance to miss: 10/20/30/40 ( %10 daytime )

Defeaning Blast*
No chance to miss makes unit unable to attack.

Drunken Haze*
% Chance to miss: 45/55/65/75

Incapacitating Bite*
% Chance to miss: 10/15/20/25

Laser*
% Chance to miss: 100

Penitence*
No chance to miss.

Smoke Screen
% Chance to miss: 40/50/60/70

• *: Drunken Haze based abilities will replace each other when casted on same unit. Animation of older one will continue.
• All these spells uses hardcoded buffs ( Curse/Drunken Haze ) thus can be dispelled, except smoke screen which works in a different way.
• Penitence's Damage Amplification part is triggered so it will continue to work, only slow will be dispelled.

Uphill Miss Chance

When a ranged unit attacks another unit/structure that is on a higher elevation level, there is a 25% chance to miss. Being close to target doesn't affect probablity, you will still miss even if you are close as a melee hero.


Motion Buffer

Every unit have a motion buffer range value that affects units attack. This value is added to the attack range and used in calculations, I will simply refer it as motion buffer range.

Melee Attacker:
If target leaves motion buffer range before melee attacker reaches his damage point, attack will miss.

Ranged Attacker:
Ranged units will abort their attack if target leaves motion buffer range. They won't reach their damage point, thus won't release projectile.

Creeps that attacking Enchantress is a good example for both cases. Melee creeps will have miss their attacks if you leave motion buffer range. Ranged creeps will abort their attack and acquire another target or follow you, as you leave motion buffer range.

Missing on a Wind Walk breaking attack only possible if target leaves motion buffer range. Wind Walk breaking attacks won't reveal the attacker if they are missed.

Total Miss Chance Calculations aka Stacking

Formula:
Total Chance to Miss: 1 - (1 - Evasion Chance)(1 - Miss Chance1)(1 - Miss Chance2)(1 - Uphill)

Evasion Chances from Skills and Items don't stack. The one with highest probablity will be chosen, and will be used in formula above.

Traxex is Inside Smoke Screen ( level 4), affected by Panda's Drunken Haze ( level 4 ) and Troll's Blind ( level 4 ), attacking Pandaren Brewmaster who is on the higher elevation level wielding a butterfly and wearing a Talisman of Evasion. Drunken Brawler is leveled to 4.

First what is the chance of evading?
Talisman, Drunken Brawler, Butterfly is present.
Butterfly has highes probablity of 30%, so it will be used only.
Drunken Haze: 75%
Blind: 44%
Smoke Screen: %70
Uphill: 25%
Total Chance to Miss = 1 - (1-30%)(1-75%)(1-44%)(1-70%)(1-25%)
Total Chance to Miss = 1-2.1609% = 97.8391% That's over 90.00% >:O

Monkey King Bar's True Strike nullifies chance of missing. Except;
-It doesn't affect structures and items. ( Uphill )
-You can still miss due to motion buffer.

I strongly recommend reading this guide for additional explanation on True Strike. Thanks to Robzor, I don't need to mention it here further.


"Evasion stacks with Backtrack" issue

Actually evasion and backtrack have no interactions, they are seperate abilities and work independantly.
-Evasion is calculated right after attack starts. ( Attack Starts-Some triggered abilities like Backstab, Counter Helix-Evasion... )
-Triggered heals like backtrack is calculated when damage is taken.
An evaded attack won't trigger damage events ( backtrack is a damage event and it won't proc when attack is evaded ) and can't place buffs on the unit. On the other hand when Backtrack procs on an attack, it will only heal the taken damage. This attack will trigger damage events, like disabling dagger and will place buffs aswell.

Formula:
Chance of taking no damage: 1 - (1-Total Miss chance)(Backtrack Chance)

Void with Butterfly and Backtrack Level 4
1 - (1-30)(1-25) = 1-52.5 = 47.5
So we can assume that they stack with diminishing returns. However they are completely different things.

Faceless Void with butterfly take 400 shots from Traxex.
He will evade 120 of them.
Other 280 shots have a chance to be backtracked. %25 with level 4.
Then, 70 of them will be backtracked.
210 of 400 shots will damage Faceless Void.
Which equals %52.5 chance to be hit, 47.5 chance of not taking damage.

[Black Isle]

Log

2009

December 30
Done in 2 hours.

December 31
Fixed Motion Buffer part.

2010

January 01
Added some information.
Minor improvements.
Grammar correction.

January 04
Added information.
Some clarifications.
Template edit.

January 09
Typos fixed.

February 23
Colored the titles.

June 16
Added couple o' spoilers. Grammar corrections.

2011

April 27
Updated. Also, some typos.
Used tabs 'n shit.

[BorisPeace-]

Cool guide.

[antiweltteilchen]

to motion buffer:

melee units will miss if attacked unit will get out of ATTACK RANGE+motion buffer range
ranged units will abort their attack

[Black Isle]

I Thanks you.

[antiweltteilchen]

Missing on a Wind Walk breaking attack only possible if target leaves the range. Wind Walk breaking attacks won't reveal the attacker if they are missed, or target is died.

working only if the attacked unit is an allowed target for the backstab.

[Neuvadium4Eva]

COOL GUIDE
''Which equals %52.5 chance to be hit, 47.5 chance of not taking damage.''

THANK YOU

[Cáno]

Another place to link people to.

[SNOW37]

nice guide phthalo

[Robzor]

A missed projectile can damage targets under the condition that the attacking unit has an attack type which provides splash damage.

You really emphasize on that purple "the range", but the motion range buffer works the same for ranged units albeit the attack won't release a missile when the target unit leaves the motion buffer range. Your statements appear to claim otherwise, the only difference between melee and ranged units is that the red miss text won't appear for ranged units.

The attack will proceed as normally if it missed, completing all regular phases (presuming that they're not cancelled prematurely), which is mainly relevant in the case of the motion buffer range.

In the guide there's a lot of focus on specific abilities, personally I'd rather see it working with generalized concepts (e.g. neglecting current abilities) regardless of how relevant aforementioned abilities might be.

The headings could be made more eye-catching to as to make them stand out from the text.

Explain the difference between a triggered heal and missing the attack, for an example: missing a unit means that there is no actual damage dealt, e.g. there isn't even a 0 damage event.

I'd put examples inside spoiler tags to prevent them from obstructing the reading process.

CBA with more feedback, I'm back to slacking.

[Black Isle]

Originally Posted by e00E

You really emphasize on that purple "the range", but the motion range buffer works the same for ranged units albeit the attack won't release a missile when the target unit leaves the motion buffer range. Your statements appear to claim otherwise, the only difference between melee and ranged units is that the red miss text won't appear for ranged units.

Why? I wrote the same.
Ranged Attacker:
Ranged units will abort their attack if target leaves the range.
( will not complete their attack, will not reach damage point, thus will not release projectile )

Thanks for the feedback Robzor, editing now.

[zuzulale]

About Backtrack and Evasion...Can't they happen to trigger in the same time?

[Steric]

Originally Posted by zuzulale

About Backtrack and Evasion...Can't they happen to trigger in the same time?

They can't. Backtrack only activates when Void take damage. If an attack misses, Void never took damage, so he can't backtrack.

[Robzor]

"The range" sounds very vague, no? I pointed it out since you shift the phrasing in the melee and ranged explanations, use the same for both or establish a common term used throughout the guide.

[Black Isle]

True, but I don't know, repetation of "motion buffer range + attack range" phrase is irritating. Saying motion buffer range is incorrect. So I used purple color to show I'm referring the same range. What can you -or someone else- suggest, for better readability in Motion Buffer part?

edit: I've made a major edit in that section. Looks fine and is readable I think.

[LysAlana]

good guide

[Black Isle]

Thanks, nice first post (:

[Numerion]

/me agrees with the first post

but...i've found few typos (there might be more)

Creeps they are attacking Enchantress
or target is died.
Trool's Blind
^^

EDIT: V np :P (and yes i am reading all your guides now ;P )

[Black Isle]

Correcting. Thanks.

[zuzulale]

About Backtrack...if void has 1 HP and he receives 200 HP when backtrack triggers he won't die. How is that? I mean Backtrack triggers after he receives dmg. So void gets damaged and will have -199HP and then he gets healed to 1HP. How does he survive with -199HP? Is there a dummy unit who takes the damage when backtrack triggers or what?