For calculating CMB, the rules say:
Add any bonuses you currently have on attack rolls due to spells, feats, and other effects. These bonuses must be applicable to the weapon or attack used to perform the maneuver.
For a character fighting unarmed, would Weapon Focus (unarmed strike) add +1 to CMB for all combat maneuvers?
I'm wondering about grappling specifically, as the rules for Weapon Focus say:
Choose one type of weapon. You can also choose unarmed strike or grapple (or ray, if you are a spellcaster) as your weapon for the purposes of this feat.
...which makes it seem like "grapple" can be considered a type of weapon distinct from unarmed strikes. It seems clearer that Weapon Focus would apply to CMB for, say, disarm or sunder maneuvers (as they deal weapon damage), but I'm not as sure about grapple or, for that matter, bull rush and trip.
... It seems clearer that Weapon Focus would apply to CMB for, say, disarm or sunder maneuvers (as they deal weapon damage), but I'm not as sure about grapple or, for that matter, bull rush and trip.
Weapon Focus(Unarmed Strike) applies to all combat maneuvers except grapples. For Weapon Focus to improve grapple CMB you need Weapon Focus(grapple)
Bull rush and trip are done while unarmed (unless you have a weapon designed for trip), so i guess it applies to both. You can apply the bonus of a trip weapon for trip attemps, you should do the same for unarmed trip attemps.