This is a Tunnels and Trolls adventure in the Castle Calahony series.
Total the combat totals of both sides and distribute the difference. Subtract armor and apply the remainder as damage to con.
If half or more of your group is wounded, one of the weapon instructors will come to your assistance. See who comes to your aid.
If half or more of the orcs are wounded, the remaining orcs fly away. Await the next attack.