Cluedo was retitled because the traditional British board game "Ludo", on which the name is based, was less well known there than its American variant "Parcheesi." The North American versions of "Clue" also replace the character "Reverend Green" from the original "Cluedo" with "Mr. Green." This is the only region to continue to make such a change. Minor changes include "Miss Scarlett" with her name being spelt with one 't', the spanner being called a wrench, and the dagger renamed a knife. In the 2016 U.S. edition, the knife was changed to a dagger. And until 2003, the lead piping was
Cluedo: Discover the Secrets the murderer, and is out of the game. Intrigue cards are linked to new "?" spaces on the board, which require one to be drawn when landed upon. The player must move to the indoor swimming pool in the center of the board to make an accusation. This adds some challenge versus the ability to make accusations from anywhere in the original game. Kate Summerscale wrote that the "Englishness and datedness of the original game are intrinsic to its appeal". She notes that "the contemporary detail is bound to feel tacky before long". She concludes that elements of "Cluedo" have