Meaning: The rules provide instructions on how to play the game.
Choice of Words: The word "rules" refers to the guidelines or instructions that govern how a game is played. "Explain" means to make something clear or understandable. "How" is used to ask or tell about the manner or way in which something is done. "Game" is a form of entertainment or competition with rules. "Played" is the past tense of "play", which means to engage in a game or activity.