Deduction board game are drawn at random. Notable members of this category include "Black Box" and "Master Mind". Investigation games are board games in which the players generally play as police, detectives or other investigators. The best known game of this type is "Cluedo". In fact, many of games in this category utilize a mechanic known as "The Missing Card," which was developed by Anthony E. Pratt for "Cluedo" ("Clue" in the United States). "The Missing Card" takes a known set of cards (or other token) and removes one or more of them. By gathering information and using deduction and logic, the players
221B Baker Street (board game) from 221B outwards (and so might be the opposite side of the board - and hence the furthest distance from the 'end' at 221B when enough clues are read to provide the solution.) 8 expansion sets with additional cases are published, numbered from 2 to 9. They can be purchased separately or are all available in the new Deluxe edition, which includes the complete set of 180 cases, plus 20 more. A ninth set has now been published with the 20 new cases. 221B Baker Street (board game) 221B Baker Street: The Master Detective Game is a board game featuring