Boys. History The idea for Diplomacy arose from Allan B. Calhamer's study at Harvard of nineteenth-century European history under Sidney B. Fay and from his study of political geography. Calhamer also drew inspiration from the card game of Hearts, in which he observed that players were at an advantage when they teamed up against the leader, and from the game of chess, which inspired him to use a limited number of spaces and pieces. The rough form of Diplomacy was created in 1954, and its details were developed through playtesting until the 1958 map and rules revisions. Calhamer paid for a 500-game print run of that version in 1959 after rejection by major companies. It has been published since then by Games Research (in 1961, then a 1971 edition with a revised rulebook), Avalon Hill (in 1976), by Hasbro's Avalon Hill division (in 1999), and now by Wizards of the Coast (in 2008) in the US, and licensed to other boardgame publishers for versions sold in other countries. Among these are Parker Brothers, Waddingtons Games, Gibsons Games, and Asmodée Editions. The first copy of the first print run was sold by the Calhamer estate through auction in 2017. Basic setting and overview The board is a map of 1901 Europe plus Turkey, Syria and North Africa. It is divided into fifty-six land regions and nineteen sea regions. Forty-two of the land regions are divided among the seven Great Powers of the game: Austria-Hungary, England, France, Germany, Italy, Russia, and Turkey. The remaining fourteen land regions are neutral at the start of the game. Thirty-four of the land regions contain "supply centers", corresponding to major centers of government, industry or commerce (e.g., Vienna and Rome); twenty-two of these are located within the Great Powers and are referred to as "home" supply centers. The remaining twelve are located in the neutral provinces. The number of supply centers a player controls determines the total number of armies and fleets a player may have on the board, and as players gain and lose control of centers, they may build (raise) or must remove (disband) units correspondingly. The land provinces within the Great Powers which contain supply centers are generally named after a major city in the province (e.g. London and Moscow) while the other land provinces within the Great Powers are generally named after a region (e.g. Bohemia and Apulia). Neutral land provinces are