|Class||Find Secret Door||Listen at Door||Find Trap|
|Halfling||1 in 6||2 in 6||1 in 6|
|Elf||2 in 6||2 in 6||1 in 6|
|Dwarf||1 in 6||2 in 6||2 in 6|
|Fighter||1 in 6||1 in 6||1 in 6|
|Magic-User||1 in 6||1 in 6||1 in 6|
|Cleric||1 in 6||1 in 6||1 in 6|
|Thief||1 in 6||2+ in 6||14%+|
As usual, the Thief is problematic. According to page B22 everybody has a 1 in 6 chance of finding a trap, except for dwarves who get 2 in 6. Labyrinth Lord has the same language. But starting B/X thieves only have a 10% chance to find traps, with the LL version getting a mighty 14% at first level. Page 13 of my Labyrinth Lord rulebook specifies that thieves only get one chance to find any given trap. That would make them actually worse at finding traps than everyone else in the party.
You'd think that goes against the intent of the design, but it wouldn't have been hard to quash the confusion by starting Find Traps at 17% or more. What do other DMs do in this situation? I tend to allow two rolls, a d6 roll and a percentile roll, but that strikes me as an inelegant way to handle the issue.