Expert trait

In dNetHack, notdNetHack, and notnotdNetHack, expert traits are a set of 21 special attributes which increase a weapon or weapon-tool's damage output or have other effects applied on-hit. Most weapons and weapon-tools possess a specific subset of expert traits that are largely consistent between weapons using the same skill, though few are wholly identical. While some expert occur on-hit, others have specific requirements related to the hero or a monster's movement or not being in two-weapon combat. All expert traits are additive to a weapon's base damage, with a skill dependent chance to trigger, the odds of which are summarised in a table further below.

Description

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"Finish detailing missing expert traits."

Zerthimon's Focus

A hero that has learned the "Zerthimon's focus" mental edge from The Sky Reflected will receive bonuses to any mercurial weapon's expert traits while at high sanity or while under the effects of clear thoughts. The chance of this effect occuring at high sanity increases by 10% for every point of sanity above 81, up to 100% at 91 and above.

Accuracy dependent expert traits

When hitting a monster, a dieroll of 1d20 is made, dieroll henceforth.

Expert trait damage bonus

Expert traits that deal bonus damage, except when stated otherwise, deal an extra amount equal to the sum of the weapon's base damage and skill damage bonus (+2 and +5 at Skilled and Expert respectively). The weapon's base damage only includes its damage dice and die faces, as well as bonus dice and flat damage bonuses, but not its enchantment. Additive flat bonus damage from a weapon's special abilities is not included in this sum, such as a crystal sword's +1 bonus flat damage per 3 enchantment or a chikage's hermargyos' bonus flat damage.

Fighting style expert traits

These four expert traits will be disabled by default and must be manually enabled or disabled through the #style extended command.

Hew

The hew fighting style expert trait cannot be used in two-weapon combat. With a ¹⁄₁₀ chance at Skilled, or always at Expert skill, weapons gain a damage bonus equal to the sum of its base damage (not including enchantment) and skill damage bonus. Additionally, sucessfully using hew will increase your own study count by half of your skill with the weapon (0 at Skilled, 1 at Expert) and burns 1 hunger for a medium sized hero.

Knock back

A weapon with the knock back fighting form expert trait deals staggering blows with a ¹⁄₂₀ chance at Skilled, or ¹⁄₅ chance at Expert. With Zerthimon's focus these chances increase to ¹⁄₁₀ at Skilled, and ¹⁄₃ at Expert.

Stunning strike

A weapon with the knock back fighting form expert trait deals stunning blows with a ¹⁄₂ chance at Skilled, or ¹⁄₁₀ chance at Expert. With Zerthimon's focus these chances instead increase to ¹⁄₅ at Skilled and ³⁄₄ at Expert. For example, at Expert a +0 trident (1d8+2 vs. small, 3d6 vs. large) deals 8 damage against a small monster (+1 from damage dice amount, +2 flat damage, +5 from skill) and 8 damage against a large monster (+3 from damage dice amount, +5 from skill) when performing a graze attack. A check against your to-hit is made:

• Skilled: To-hit must exceed an amount between -9 and 29 (Dieroll + 10 - 1d20)
• Expert: To-hit must exceed an amount between -19 and 0 (Dieroll - 20)

Movement expert traits

Braced

Hitting a monster that has attacked you on the last turn with a weapon that has the braced expert trait will deal bonus damage ¹⁄₁₀ of the time at Skilled, and always does at Expert. This damage is equal to the sum of the weapon's base damage (not including enchantment) and skill damage bonus. Zerthimon's focus doubles the damage bonus ¹⁄₄ of the time at Skilled, and always does at Expert.

On-death expert traits

Cleave

The cleave expert trait will not trigger if the hew fighting form expert trait is currently active. Killing a monster with a cleaving weapon will automatically make a second attack to either the left or the right of the dead monster, and, with Zerthimon's focus, a third attack. At Skilled, the odds of these attacks triggering are ¹⁄₄, and always occur at Expert.

Second

The second expert trait requires you to be in two-weapon combat with a weapon with the second expert trait in the offhand and to kill a monster. Landing the last blow with either the offhand or main hand will automatically make a second attack with the offhand weapon against a monster in melee range. At Skilled, the odds of this attack occuring is ¹⁄₄, and always occurs at Expert. With Zerthimon's focus, this second attack will deal double damage ¹⁄₄ of the time, or always at Expert.

Other expert traits

Long slash

The long slash expert trait adds bonus base damage to attacks made with high to-hit, up to +4x base damage. Four succesive checks against to-hit are made, with the amount needed for every bonus amount of base dice increasing by 20 points each time:

• Skilled:
  • +1x: To-hit must exceed 21–59 (Dieroll + 40 - 1d20)
  • +2x: To-hit must exceed previous amount by 20 (41–79)
  • +3x: To-hit must exceed previous amount by 20 (61–99)
  • +4x: To-hit must exceed previous amount by 20 (81–119)
• Expert:
  • +1x: To-hit must exceed 21–40 (Dieroll + 20)
  • +2x: To-hit must exceed previous amount by 20 (41–60)
  • +3x: To-hit must exceed previous amount by 20 (61–80)
  • +4x: To-hit must exceed previous amount by 20 (81–100)

Zerthimon's focus is cumulative with long slash if the trait added at least one count of bonus base dice:

• Skilled: ¹⁄₄ chance of adding another +1x bonus base damage
• Expert: Always adds +1x.

Graze

Missing a monster with a weapon with the graze expert trait has a chance to instead inflict a lesser amount of damage. Zerthimon's focus instead has a ¹⁄₂₀ chance of making the attack hit instead at Skilled, or ¹⁄₄ at Expert. A graze attack's damage is equal to the sum of the weapon's dice amount, bonus dice amount, flat bonus damage and enchantment.

Create opening

At Skilled, when attacking a monster with a weapon with the create opening expert trait, there is a ¹⁄₁₀ chance of making that monster "open" (vulnerable to sneak attack) for the next 2 turns. At Expert skill monsters hit will always be made vulnerable. At Skilled Zerthimon's focus adds a sneak attack die with a ¹⁄₄ chance and a second one with a ¹⁄₂₀ chance. At Expert, it always adds at least one and has a ¹⁄₄ chance of adding a second one.

Tables

Weapons by expert traits

Weapon	Fighting Form Expert Traits					Active Expert Traits
Name	Hew	Fell	Stunning Strike	Focus Fire	Knock Back	Knock Back Charge	Stop Thrust	Penetrate armor	Long Slash	Striking	Quick	Second	Cleave	Lunge	Braced	Graze	Create Opening	Bleed	Blade Song	Blade Dance	Puncture
aklys	Hew		Stunning Strike					Penetrate armor
assault rifle				Focus Fire
atgeir	Hew			Focus Fire			Stop Thrust									Graze
athame				Focus Fire							Quick	Second
axe	Hew
bar	Hew	Fell	Stunning Strike		Knock Back	Knock Back Charge
bardiche	Hew								Long Slash
battle-axe	Hew	Fell											Cleave
beast crusher	Hew		Stunning Strike		Knock Back
beast cutter	Hew		Stunning Strike					Penetrate armor										Bleed
bec de corbin	Hew		Stunning Strike				Stop Thrust	Penetrate armor
bestial claw																	Create Opening	Bleed
bill-guisarme					Knock Back													Bleed
blade of grace																	Create Opening
blade of mercy				Focus Fire													Create Opening
blade of pity												Second
bladed bow				Focus Fire
boomerang				Focus Fire
bow				Focus Fire
bow-blade									Long Slash
breaking wheel					Knock Back	Knock Back Charge
broadsword																Graze
cane				Focus Fire			Stop Thrust							Lunge
carcosan sting				Focus Fire								Second
chakram				Focus Fire
chikage	Hew			Focus Fire
church blade	Hew	Fell												Lunge
church shortsword				Focus Fire													Create Opening
church-hammer	Hew				Knock Back			Penetrate armor
church-pick	Hew	Fell						Penetrate Armor					Cleave
clawed hand	Hew		Stunning Strike		Knock Back
club	Hew		Stunning Strike		Knock Back
crossbow				Focus Fire
crow quill				Focus Fire			Stop Thrust							Lunge				Bleed
crysknife				Focus Fire							Quick	Second
crystal sword				Focus Fire			Stop Thrust									Graze
dagger				Focus Fire							Quick	Second
dart				Focus Fire
demon claw	Hew	Fell
devil fist	Hew	Fell						Penetrate Armor
diskos	Hew	Fell
double force-blade													Cleave
double sword													Cleave
droven crossbow				Focus Fire
droven dagger				Focus Fire							Quick	Second
droven greatsword		Fell											Cleave			Graze
droven lance							Stop Thrust	Penetrate armor						Lunge	Braced
droven short sword				Focus Fire													Create Opening
droven spear				Focus Fire			Stop Thrust														Puncture
dwarvish mattock	Hew							Penetrate armor
dwarvish short sword				Focus Fire													Create Opening
dwarvish spear				Focus Fire			Stop Thrust								Braced
elven bow				Focus Fire
elven broadsword
elven dagger				Focus Fire							Quick	Second							Blade Song
elven lance							Stop Thrust	Penetrate armor						Lunge	Braced				Blade Song
elven mace	Hew		Stunning Strike					Penetrate armor												Blade Dance
elven scimitar									Long Slash	Striking										Blade Dance
elven short sword				Focus Fire													Create Opening		Blade Song
elven sickle																		Bleed	Blade Song
elven spear				Focus Fire			Stop Thrust							Lunge					Blade Song
evelyn				Focus Fire
fang of apep				Focus Fire							Quick	Second
fauchard	Hew
flail	Hew		Stunning Strike					Penetrate armor
force pike				Focus Fire			Stop Thrust							Lunge	Braced
force sword							Stop Thrust	Penetrate armor						Lunge
force whip								Penetrate Armor
glaive	Hew
goedendag	Hew		Stunning Strike	Focus Fire	Knock Back
gold-bladed vibrospear				Focus Fire			Stop Thrust							Lunge	Braced
gold-bladed vibrosword				Focus Fire			Stop Thrust							Lunge
gold-bladed vibrozanbato		Fell							Long Slash				Cleave
great mace	Hew		Stunning Strike		Knock Back	Knock Back Charge		Penetrate Armor
greatclub	Hew	Fell			Knock Back	Knock Back Charge
guisarme																		Bleed
halberd	Hew				Knock Back		Stop Thrust	Penetrate armor							Braced
high-elven warsword	Hew	Fell							Long Slash				Cleave						Blade Song	Blade Dance
hunter's axe	Hew
hunter's long-axe	Hew	Fell					Stop Thrust						Cleave
hunter's longsword				Focus Fire			Stop Thrust									Graze
hunter's shortsword				Focus Fire							Quick						Create Opening
javelin				Focus Fire			Stop Thrust														Puncture
katana	Hew			Focus Fire												Graze
katar								Penetrate Armor									Create Opening
khakkhara			Stunning Strike	Focus Fire	knock Back		Stop Thrust								Braced
khopesh	Hew																Create Opening	Bleed
knife				Focus Fire							Quick	Second
lance							Stop Thrust	Penetrate armor						Lunge	Braced
long saw																		Bleed
long sword				Focus Fire			Stop Thrust									Graze
lucern hammer	Hew		Stunning Strike				Stop Thrust	Penetrate armor							Braced
mace	Hew		Stunning Strike					Penetrate armor
macuahuitl	Hew		Stunning Strike													Graze
mirrorblade				Focus Fire													Create Opening
moon axe	Hew	Fell											Cleave
morning star	Hew		Stunning Strike					Penetrate armor										Bleed
nagamaki	Hew								Long Slash				Cleave			Graze
naginata	Hew
ninja-to				Focus Fire													Create Opening	Bleed
odachi	Hew								Long Slash							Graze
orcish dagger				Focus Fire							Quick	Second
orcish short sword				Focus Fire													Create Opening
orcish spear				Focus Fire			Stop Thrust														Puncture
partisan							Stop Thrust	Penetrate armor							Braced
pick-axe	Hew							Penetrate armor
pincer staff							Stop Thrust
pistol				Focus Fire
poleaxe	Hew		Stunning Strike	Focus Fire
quarterstaff	Hew	Fell	Stunning Strike		Knock Back	Knock Back Charge
rakuyo-dagger				Focus Fire								Second
rakuyo-saber				Focus Fire
ranseur							Stop Thrust	Penetrate armor							Braced
rapier				Focus Fire			Stop Thrust							Lunge
red-eyed vibrosword				Focus Fire			Stop Thrust							Lunge
rifle				Focus Fire
rod of force																Graze
rondel dagger				Focus Fire				Penetrate Armor			Quick	Second
runesword																Graze
saber				Focus Fire					Long Slash
saw cleaver																		Bleed
saw spear							Stop Thrust											Bleed			Puncture
scalpel				Focus Fire							Quick							Bleed
scimitar									Long Slash	Striking
scythe		Fell											Cleave					Bleed
seismic hammer	Hew		Stunning Strike					Penetrate armor
set of crow talons												Second						Bleed
shanta-pata				Focus Fire			Stop Thrust						Cleave
shepherd's crook		Fell
short sword				Focus Fire													Create Opening
shuriken				Focus Fire
sickle																		Bleed
silverknight scythe		Fell											Cleave					Bleed
silverknight spear							Stop Thrust								Braced						Puncture
silverknight sword				Focus Fire			Stop Thrust							Lunge
smithing hammer	Hew		Stunning Strike
sniper rifle				Focus Fire
soldier's rapier				Focus Fire			Stop Thrust							Lunge
spear				Focus Fire			Stop Thrust							Lunge							Puncture
spetum					Knock Back		Stop Thrust								Braced
spike				Focus Fire
spoon				Focus Fire							Quick	Second
square club			Stunning Strike		Knock Back	Knock Back Charge
stake				Focus Fire			Stop Thrust				Quick	Second
stiletto				Focus Fire							Quick	Second
tecpatl				Focus Fire							Quick	Second						Bleed
tonitrus	Hew		Stunning Strike
tooth	Hew		Stunning Strike	Focus Fire	Knock Back	Knock Back Charge		Penetrate Armor
trident				Focus Fire			Stop Thrust									Graze
two-handed sword		Fell											Cleave			Graze
unicorn horn				Focus Fire							Quick	Second
vibroblade				Focus Fire													Create Opening
voulge	Hew
wakizashi				Focus Fire								Second					Create Opening
war hammer	Hew		Stunning Strike					Penetrate armor
whip-saw													Cleave					Bleed
white vibrospear				Focus Fire			Stop Thrust							Lunge	Braced
white vibrosword				Focus Fire			Stop Thrust							Lunge
white vibrozanbato		Fell							Long Slash				Cleave
worm tooth				Focus Fire							Quick	Second
yumi				Focus Fire

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