Normal characters have a chance equal to a roll of 1 on 1d6 (about 17%) to detect a trap if a search for one is made within the current encounter area. Thieves have a special ability to find and remove traps which supersedes this roll, based on their level (a first level thief can find/remove traps 20% of the time, while a tenth level thief can do so 63% of the time). Encounter areas can only be searched a single time, but all characters within the adventuring party will receive a chance to find any hidden traps (and if one is found, all thieves within the party will be granted a chance to automatically disarm the trap).