Force-fighting a monster always suppresses any sort of extra attacks you would get (whether from polyform, monk kick attacks, etc), and results in a simple melee attack with your arms or arm-equivalents. This is intended to provide a simple way to fight cockatrices and other dangerous monsters while giving the player responsibility over it: they are not coddled with auto-suppressing of dangerous attacks, but also aren’t required to find some alternate way to fight such monsters. It also resolves the flavor problem of why the hero can’t simply decide not to eat the cockatrice’s brain.

This does not define what force-fighting should do if you are in a form that lacks any claw or weapon attacks.

Monks with Expert or Master level martial arts can force-fight walls to break them. (Possibly not uncarved rock though.)

Force-fighting with Cleaver makes it attack in an arc to the space you are hitting and the two adjacent spaces regardless of what’s in that space, allowing you to hit two monsters at the ends of the arc even if there is nothing between them.

If polymorphed into a sufficiently strong monster, you can force-fight down or kick the ground to cause a shockwave that hits all immediately adjacent ground-bound monsters.

If polymorphed into a voluntarily exploding monster (e.g. a sphere or light), the player can #monster to explode without actually attacking anything. (You can already do this by forcefighting thin air, so this would just add an additional way to do it and a prompt when you polyself.)

You can force-fight a web to cut it, which may occasionally fail and get you or the weapon stuck in the web.

Monks can forcefight or kick boulders and break them with high enough Strength.

Grand Master martial arts skill allows you to (attempt to) force-fight boulders and statues to shatter them with your bare hands.