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
Mystery Mansion (board game) first ask if (s)he has a particular item Clue card. If the answer is yes, it will then ask if the player has a specific person Clue card. If the answer is also yes, then that player wins. There are nine optional "Turn" cards: three marked "Move", three marked "Look:, and three marked "Let's talk". These can be used by a player as flash card to keep track of their three actions during their turn. In 2015, finalist Ryan Keebaugh selected Mystery Mansion as the secret ingredient for his piece during the Iron Composer competition. Mystery Mansion (board game) Mystery