I was reading Tom Brown's School Days, and I came across the part where they were describing a sport called backswording, in which the competitors will have their left hand tied to their leg/back, and they will be armed with a stick with their right arm. The aim of the game, is to break the head of your opponent, who is also tied up and armed in like manner.
I am not sure how much damage is being done, when someone "breaks" his opponent's head. Does he really crack his skull and break his head? or does he just "break" the skin of his head?
In both cases, blood must flow, that I know, and the loser of the game is when any amount of blood, no matter how little, flows down his forehead, or anywhere above his eyebrows, and is seen.
So, going back to my question, what exactly does "break one's head" mean?