221B Baker Street: The Master Detective Game is a board game based on Arthur Conan Doyle's fictional detective Sherlock Holmes. The players have to solve cases using the clues provided by visiting locations on the board such as "221B Baker Street", "Scotland Yard", "Apothecary" and "Pawn Broker". The original game has twenty cases, but there have been several expansion packs with new cases. A board game is any game played on a board (that is, a premarked surface) with counters or pieces that are moved across the board. ... Arthur Conan Doyle Sir Arthur Ignatius Conan Doyle (May 22, 1859 â July 7, 1930) was a Scottish author most famously known for his stories about the detective Sherlock Holmes, which are generally considered a major innovation in the field of crime fiction. ... Sherlock Holmes Sherlock Holmes (1854â1957, according to William S. Baring-Gould) is a fictional detective of the late 19th and early 20th centuries, created by British author and physician Sir Arthur Conan Doyle. ... (Sir Arthur Conan Doyle, A Study in Scarlet, 1887) 221B Baker Street is the fictional London residence of the detective Sherlock Holmes, created by author Arthur Conan Doyle. ... New Scotland Yard, London New Scotland Yard, often referred to simply as Scotland Yard or The Yard, is the headquarters of the Metropolitan Police Service, responsible for policing Greater London (although not the City of London itself). ...