Check

Check(/check) is a command in Final Fantasy XI. When using this command versus an enemy creature, it will inform the player of the relative difficulty of defeating the creature. The easiest type of creature is listed as "too weak to be worth while", listed as just "too week" in the auto-translator. This means that a creature will not give the player any experience for defeating it.

"Easy prey" is a measure of a creature that will grant less than 50 base experience points. At low level, this means that the creature is at least 4 levels lower than the player; however, at high level it can be a dozen levels beneath the player or party level. The scale gradually increases as the character level increases.

After easy prey is a "decent challenge," which denotes a creature that is only a few levels beneath the player's current level and would grant between 50 and 99 experience if defeated. "Even match" is used only when the creature being /checked is exactly the same level as the creature using the command. "Tough" denotes an enemy a few levels above the player's level, followed by "very tough" which is a few levels above that, and finally "incredibly tough."