What is Challenge Rating?
DMs evaluate the difficulty of a specific encounter using the Challenge Rating (CR) system. The combined critical rate (CR) of all the monsters in an encounter is calculated, accounting for any resistances and immunities that increase effective hit points as well as vulnerabilities that counteract each resistance or immunity.
If there are more vulnerabilities than resistances or immunities, multiply effective hit points by 2. For instance, if a party of four successfully takes down a monster with CR 3, the party as a whole gains 700 XP. Each party member gains 175 XP, unless the DM specifies something different. Players level up as they accumulate XP, gaining new skills and increasing their power. Greater monster or enemy power is typically present in encounters with higher CR.
How is Challenge Rating Used?
The difficulty of an encounter is determined using the Challenge Rating (CR) system. The encounter becomes more challenging the higher the CR.
The hit points, damage output, resistances, and immunities of a creature are taken into account when calculating its challenge rating. Depending on what else the creature has that might influence the battle, the CR is then multiplied by a variety of other variables. Extra attacks or unique abilities are a few of these. Pages 274–281 of the Dungeon Master's Guide contain instructions on how to determine a creature's challenge rating.
What is the Difference Between Challenge Rating and Level?
In Dungeons and Dragons, a creature's Challenge Rating (CR), which distinguishes it from Level, represents how challenging it will be for a party of explorers. The difficulty level of an encounter increases with CR. On the other hand, a creature's Level reflects its true strength and prowess.
You'll need to consider the party's level as well as the creatures' CRs when planning an encounter, so how does this actually work in practice? Consider a scenario in which your party consists of four first-level characters. A single creature with a CR of 4 would be too difficult for them to face off against, while four creatures with a CR of 1 would probably be too simple.
Instead, you'll want to strike a balance that is appropriate for your party's level and experience. They will be able to handle more difficult challenges as they level up and develop their own power. Your players will become more adept at choosing the appropriate type of encounters for their current situation with time and practice.