Use of an Umpire to Hide Troop Movements in a War Game

Three maps should be provided, either in separate rooms or separated from each other by screens: one for each player, and one in the centre for the Umpire.* Each Commander and his subordinates will be allowed access only to their own map, the Umpire and his assistants moving from one side to the other. [...] Whenever any portion of OIK; of the opposing forces comes within the view of the other, the corresponding blocks of the former must be placed on the map of the latter and rice ver...