MerricB said:Find a secret door.
Moldvay: 1 in 6 chance on d6 for most classes, 2 in 6 chance for elves.
AD&D: as Moldvay.
AD&D 2E: as Moldvay
Seriously? You know, I played 2e for years, and I don't think we ever knew the rule for that. I remember hunting through the phb and dmg for it. The chance for elves was defined in their racial description in the races chapter, but I never saw an actual rule for how other people did it. Maybe they just assumed you knew the rule from the first edition, or mabye I had a bad copy of the DMG or something.