I'm British. I only have a very vague memory of the game from my childhood. I didn't remember what the goal was, but I remembered you have to hit the opponent's one. I don't remember if I ever played it or not.
Repeat until one conker is smashed into oblivion.
If your conker wins against multiples it becomes named mythically: a twoer, a threer, and so on.
I once had a niner. a fiver took it down.