World conker champion found with steel chestnut, cleared of cheating

Is this game well-known enough in Britain and Ireland that readers will know what on earth is being alleged just from reading this article? Or are you expected to have to google it?

Apparently it’s a game where you take turns swinging a chestnut on a string and trying to hit the opponent’s chestnut and break it. Yes, I can see how a steel fake chestnut would be an advantage here, though I’m amazed it wouldn’t be instantly obvious to even a casual observer that the look and sound were wrong. So maybe I’m still missing something.

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.