Kriegspiel (chess) follows. The game is played with three boards, one for each player; the third is for the umpire (and spectators). Each opponent knows the exact position of just their pieces, and does not know where the opponent's pieces are (but can keep track of how many there are). Only the umpire knows the position of the game. The game proceeds in the following way: The umpire announces: Pawn promotions are not announced. Kriegspiel is sometimes used in chess problems. In these, usual variations introduced by different black moves are replaced by variations introduced by different announcements. An example of a
John Littlewood (chess player) siblings. He did not start playing chess until he was 13, when he was introduced to the game by a friend. He kept on losing to his friend, so he went into the school library and checked out every single chess book. He then read a lot of chess tactics, and eventually beat his friend. At 16 he had improved and joined the local chess club. As he had not played that many people, he was surprised when he found he could beat everyone in the club. At this point he became very keen on the game. While at Sheffield