Attack

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Revision as of 14:08, 26 February 2013 by Onderduiker (talk | contribs) (Added chance to hit table, application order of AR and defense bonuses (explanatory notes to follow))
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Diablo II Notation Basic Class Skill Item Ally Quest Area Monster Tale
Attribute Unit Animation Attack Damage Death
Two weapons Fires Magic Arrows Explosive Arrows Piercing Attack Attack Rating AR vs Demons AR vs Undead
% Attack Rating Defense Enhanced Defense Defense per hit % Defense Defense vs Melee Defense vs Missile
Target Defense Ignore Defense Block Chance to Cast On Attack On Striking When Struck

Attack skills are active skills that apply weapon damage and normally require a hit check, which needs to be successful before that damage can be applied, and other events triggered. All character classes start with the standard Attack and Throw skills, while the remainder are as follows:


Amazon Assassin Barbarian Druid Necromancer Paladin


Sorceress has no attack skills of her own, other than the common Attack and Throw.

Chance to hit

The following attack skills do not require a hit check, and always hit:

Otherwise, an attack skill normally requires a successful hit check to apply its weapon damage and trigger events. When a hit check is performed, chance to hit is determined by the relationship between attacker level (alvl) and defender level (dlvl), and attacker Attack Rating (AR) and defender Defense rating (DR):


% Chance to hit = 100 * 2 * (alvl / (alvl+dlvl) ) * (AR / (AR+DR) )


Chance to hit has a 5% floor and 95% ceiling, so there is always at least 5% chance to hit, or miss. However, when a player character is running, hit checks are not made for any attacks made while doing so and these attacks always hit, although this does not apply while using the following mobile attack skills:


Chance to hit
Initial Final
5% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95%
5% 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00
10% 2.00 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50
15% 3.00 1.50 1.00 1.33 1.67 2.00 2.33 2.67 3.00 3.33 3.67 4.00 4.33 4.67 5.00 5.33 5.67 6.00 6.33
20% 4.00 2.00 1.33 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75
25% 5.00 2.50 1.67 1.25 1.00 1.20 1.40 1.60 1.80 2.00 2.20 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80
30% 6.00 3.00 2.00 1.50 1.20 1.00 1.17 1.33 1.50 1.67 1.83 2.00 2.17 2.33 2.50 2.67 2.83 3.00 3.17
35% 7.00 3.50 2.33 1.75 1.40 1.17 1.00 1.14 1.29 1.43 1.57 1.71 1.86 2.00 2.14 2.29 2.43 2.57 2.71
40% 8.00 4.00 2.67 2.00 1.60 1.33 1.14 1.00 1.13 1.25 1.38 1.50 1.63 1.75 1.88 2.00 2.13 2.25 2.38
45% 9.00 4.50 3.00 2.25 1.80 1.50 1.29 1.13 1.00 1.11 1.22 1.33 1.44 1.56 1.67 1.78 1.89 2.00 2.11
50% 10.00 5.00 3.33 2.50 2.00 1.67 1.43 1.25 1.11 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.80 1.90
55% 11.00 5.50 3.67 2.75 2.20 1.83 1.57 1.38 1.22 1.10 1.00 1.09 1.18 1.27 1.36 1.45 1.55 1.64 1.73
60% 12.00 6.00 4.00 3.00 2.40 2.00 1.71 1.50 1.33 1.20 1.09 1.00 1.08 1.17 1.25 1.33 1.42 1.50 1.58
65% 13.00 6.50 4.33 3.25 2.60 2.17 1.86 1.63 1.44 1.30 1.18 1.08 1.00 1.08 1.15 1.23 1.31 1.38 1.46
70% 14.00 7.00 4.67 3.50 2.80 2.33 2.00 1.75 1.56 1.40 1.27 1.17 1.08 1.00 1.07 1.14 1.21 1.29 1.36
75% 15.00 7.50 5.00 3.75 3.00 2.50 2.14 1.88 1.67 1.50 1.36 1.25 1.15 1.07 1.00 1.07 1.13 1.20 1.27
80% 16.00 8.00 5.33 4.00 3.20 2.67 2.29 2.00 1.78 1.60 1.45 1.33 1.23 1.14 1.07 1.00 1.06 1.13 1.19
85% 17.00 8.50 5.67 4.25 3.40 2.83 2.43 2.13 1.89 1.70 1.55 1.42 1.31 1.21 1.13 1.06 1.00 1.06 1.12
90% 18.00 9.00 6.00 4.50 3.60 3.00 2.57 2.25 2.00 1.80 1.64 1.50 1.38 1.29 1.20 1.13 1.06 1.00 1.06
95% 19.00 9.50 6.33 4.75 3.80 3.17 2.71 2.38 2.11 1.90 1.73 1.58 1.46 1.36 1.27 1.19 1.12 1.06 1.00


Level

Player character and mercenary level is displayed on the character screen and mercenary screen (not accessible in Classic games) respectively. Pet level is normally character level at time of summoning, with the following exceptions:


Class Pet Level
Amazon Decoy min( [clvl * 3/4] + slvl , clvl)
Valkyrie min( [clvl * 3/4] + slvl , clvl)
Assassin Blade Sentinel min(slvl + (0.75*clvl) , clvl) [1]
Druid Raven slvl + clvl - 2
Poison Creeper [clvl * 3/4] + slvl [2]
Carrion Vine [clvl * 3/4] + slvl [3]
Solar Creeper [clvl * 3/4] + slvl [4]
Necromancer Bone Wall mlvl
Bone Prison mlvl


Mind blasted, converted or revived monster level is clvl when clvl < mlvl, otherwise it remains mlvl.


Monster levels are their inherent levels in Normal, but they are determined by the area level in which they spawn in Nightmare and Hell (unless they are bosses, in which case their inherent level is still used). Some monster bonuses increase their level:


Monster Mlvl
Champion +2
Fanatic +2
Ghostly +2
Possessed +2
Berserker +3
Unique +3
Super Unique +3
Minion +3


If a boss receives random Unique bonuses in Nightmare and Hell, the Unique level +3 bonus also applies in all difficulty levels (so this bonus applies to Griswold, Radament and Nihlathak). [5] [6]


Chance to hit displayed by character screen when cursor is over any Attack Rating or Defense field always uses inherent monster levels in Nightmare and Hell, and it does not apply any level bonuses. [7]


Level difference has a significant impact on chance to hit at low character levels, but it becomes much less significant as character level increases.

  • For example, Corpsefire is level 4 in Normal and he has 26 Attack Rating and 5 Defense: a level 1 Amazon with 95 AR and 10 Defense has just 38% chance to hit him, while he has 95% chance to hit her; however, the same Amazon at level 4 now has 95% chance to hit him, and he only has ~72% chance to hit her.
  • In a Hell Expansion game he is level 70: if a level 67 Amazon has 75% chance to hit him, and he has 25% chance to hit her, then the same Amazon at level 70 has ~77% chance to hit him, and he has ~24% chance to hit her. A difference of three levels now has a much less significant impact.


Attack Rating

Player character's Attack Rating is displayed to the right of Dexterity on the character screen: top field displays that for any attack assigned to the left mouse button, while bottom field displays that for any attack assigned to the right mouse button. When two weapons are equipped and both are used to attack, AR for both is displayed with that of the primary weapon on top. Chance to hit last target (or a Fallen at start of first game) for primary weapon is displayed when cursor is over AR field.


Attack Rating values are not displayed for Blade Sentinel, Blade Fury and Blade Sentinel, despite the fact that these require a hit check. They are also not displayed for Charged Strike and Lightning Strike. However, while the latter two require a hit check to apply javelin or spear damage, they are two of a number of skills that trigger events on attack or upon missile collision, regardless of whether or not the attack's hit check is successful:


  1. Attack Rating
    Attack Rating (Based on Character Level)
    Attack Rating Against Demons (when applicable)
    Attack Rating Against Undead (when applicable)
  2. % Attack Rating


Defense

Player character's defense is displayed to the right of Dexterity on the character screen. Chance to hit of last attacker (or a Fallen at start of first game) is displayed when cursor is over Defense field.


  1. Armor
  2. Ethereal bonus
  3. Enhanced Defense
  4. Defense
  5. - Monster Defense per hit
  6. Stone Skin Unique bonus
  7. Inner Sight
  8. % Defense
  9. Berserk penalty
  10. Defense vs Melee
    Defense vs Missile
  11. -% Target Defense
  12. Ignore Target's Defense


Estimation

The main difference between the two components of the chance to hit calculation is that the level component is multiplied by two. As a result, the same estimation procedure can be used for both components without much modification needed:

  • For the level component, take the ratio between attacker level and defender level and find a similar ratio in the table.
  • For the ratings component, take the ratio between Attack Rating and Defense rating and find a similar ratio in the table.
  • Multiply them together and double the result.


1 Attacking 2 Ratio 2 Attacking 1
1 2
0.98 64 1 0.02
0.97 32 1 0.03
0.94 16 1 0.06
0.92 12 1 0.08
0.91 10 1 0.09
0.89 8 1 0.11
0.88 7 1 0.13
0.86 6 1 0.14
0.83 5 1 0.17
1 Attacking 2 Ratio 2 Attacking 1
1 2
0.8 4 1 0.2
0.78 7 2 0.22
0.75 3 1 0.25
0.73 11 4 0.27
0.71 5 2 0.29
0.69 9 4 0.31
0.67 2 1 0.33
0.65 15 8 0.35
0.64 7 4 0.36
1 Attacking 2 Ratio 2 Attacking 1
1 2
0.62 13 8 0.38
0.6 3 2 0.4
0.58 11 8 0.42
0.56 5 4 0.44
0.53 9 8 0.47
0.52 17 16 0.48
0.51 33 32 0.49
0.5 65 64 0.5
0.5 1 1 0.5


For example, to find player A's chance to hit player B when player A is level 64 with 3,000 AR, while player B is level 66 with 2,000 Defense:


1 Attacking 2 Ratio 2 Attacking 1
1 2
0.6 3 2 0.4
0.51 33 32 0.49


  1. Level ratio is 64:66 or 32:33 (/2), so read 0.49 from the table.
  2. Ratings ratio is 3:2, so read 0.6 from the table.
  3. Chance to hit ~ 100 * 2 * 0.49 * 0.6 ~ 58.8%


Reference
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