Kernrechtsfrage
Whether the facts met the requirements of assault under Art. 134 CP rather than a mutual brawl.
Extrahierter Entscheid
The attack was not clearly unilateral; the cantonal court could not separate the events into two phases and infer assault.
Extrahierte Begründung
B.'s striking back at the door-opening incident was not purely defensive and the ensuing violence formed one continuous material event. Without a clearly unilateral attack, Art. 134 CP cannot apply.