King of the Hill Explanation:

King of the Hill or "KOTH" is an exciting variant in which the goal is to get your king to the center of the board or "top of the hill".

• Games can still end in the traditional ways of checkmate, stalemate and time-out.
• The game can also end when a player moves their king to any of the four central squares.
• e4, d4, e5, and d5 are "top of the hill" squares, winning the game on the spot for either White or Black, regardless of the nature of the position.

(Source: Chess.com)