Challenge Rating (CR) is a numerical value used in tabletop role-playing games, particularly in Dungeons & Dragons, to indicate the difficulty of a creature or encounter for a party of adventurers. It helps game masters assess how challenging a monster or situation will be for a group of players, allowing for balanced gameplay. A higher CR suggests a tougher challenge, while a lower CR indicates an easier encounter. The CR system is designed to guide game masters in creating engaging and appropriate challenges for their players. By comparing the party's average level to the CR of a creature, the game master can determine if the encounter will be manageable, difficult, or overwhelming, ensuring a fun and dynamic gaming experience.