Base attack bonus

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In dNetHack, notdNetHack and notnotdNetHack, the base attack bonus (abbreviated as BAB) determines the to-hit bonus that a hero gains for each of their experience levels. Each hero's base attack bonus is determined by their role, and may also depend on the type of weapons that they use. Various monsters may also get a base attack bonus to their to-hit as well.

Base attack bonus by role

Roles with a given base attack bonus are listed as follows:

Spirits

The following spirits alter the hero's base attack bonus while the hero has them bound:

  • A hero that has Berith bound has their base attack bonus raised to +1 to-hit per level.
  • A hero that has Enki bound has their base attack bonus raised to +0.75 to-hit per level.
  • A hero that has Eurynome bound and is not wielding a weapon in their main hand has their base attack bonus raised to +1 to-hit per level.
  • A hero that has Eve bound has their base attack bonus raised to +1 to-hit per level when shooting weapons and projectiles, as with Rangers.

Weapons

Certain weapons can boost a hero's base attack bonus while they are in use, regardless of role:

  • A hero that is wielding a lightsaber, and has either extrinsic telepathy or else has intrinsic telepathy and is currently blind, has their base attack bonus raised to +1 to-hit per level. A hero that is wielding a lightsaber and only has intrinsic telepathy has their base attack bonus raised to +0.75 to-hit per level.

Other items

Orrery glyphs are thoughts sold by grotesque peeper insight merchants that can increase the to-hit granted from a hero's base attack bonus by 30%.

Monsters

Various monsters have base attack bonuses tied to their level that are often (but not always) related to their skill in martial combat.

The following base rules apply for a monster's base attack bonus:

  • Monsters that do not have a flag determining their base attack bonus (as listed below) gain +0.75 to-hit per monster level.
  • Weapons and projectiles thrown or fired by monsters without a flag for their base attack bonus gain a bonus of +0.67 to-hit per monster level.

Monsters with full BAB

The following monsters are flagged as having a full base attack bonus:

Monsters with half BAB

The following monsters are flagged as having a halved base attack bonus:

A user has suggested improving this page or section as follows:

"consider strategy section after."

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