About King of the Hill
King of the Hill (KoTH) is a relatively straightforward concept: Entrants create bots; bots compete against each other.
Making a KoTH challenge
The exact details of the competition can be pretty much anything you want, as long as there is a clear win condition. The most common format is a round-robin point based format, where every bot plays against every other bot and the winner is the one who wins the most points.
You must also have a controller that can actually run the game, for obvious reasons.
Entering a KoTH challenge
The gamemaster will tell you the goal of the game in their post, what language it uses, and what the entry format is (class, function, etc.) as well as the entry closure date.
If you want to test your bot against others, you can copy the controller that the gamemaster provides and start simulating the game.