'Cluedo', known as 'Clue' in the USA, is a murder mystery board game created in 1943 by Anthony E. Pratt (1903-1994) from Birmingham, England. Players can choose to be one of six characters, including Reverend Green (Mr Green in the USA). The other characters are Miss Scarlett, Colonel Mustard, Professor Plum, Mrs Peacock and Mrs White. Each are represented by a coloured token that befits their names. In 2016, Hasbro launched an updated version of the game, replacing Mrs. White with Dr. Orchard. She is represented by a pink token.

The aim of the game is to work out who murdered the game's victim (Mr Black in UK versions and Mr Boddy in US versions), where the crime took place, and which weapon was used. The board shows a map of an English country house, including rooms, corridors and secret passages. Players move their tokens from room to room to eliminate people, places, and weapons. The player who correctly accuses who, what, and where the murder took place wins the game.

The potential murder weapons in the game are a candlestick, lead piping, a dagger, a revolver, rope, and a spanner/wrench. The rooms in which the murder may have taken place are the kitchen, dining room, ballroom, conservatory, billiard room, library, study, hall, and lounge.

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