Acey Deucey, also known as In-Between or Sheets, is a simple card game that involves betting.
Before the action, each player must add their ante into the pot. Two cards are then dealt face-up to one player. That player then bets from nothing to the amount that is in the pot at the time whether or not the third card will numerically fall in between the first two. If the third card falls in between the two other cards, the bettor takes the amount he bet out of the pot; if the third card falls outside of the two other cards, the bettor must add what he bet to the pot; and if the third card matches the numerical value of one of the other two cards, the bettor must add to the pot double what he bet. If two cards of the same value come up, e.g. 2,2 the bettor picks if the next card will be higher or lower and bets. If the next card is the same as the last two, i.e. a 2, the bettor must triple his/her bet.
The rules and specifics of the game often vary from region to region. For example in Liaoning province, northeast China the minimum number of players is 4 and each player is required to ante before the first card is turned. Two cards are then dealt face-up to one player. That player then bets from nothing to the amount that is in the pot at the time (during the first time around the table players are only allowed to bet up to half of the pot) whether or not the third card will numerically fall in between the first two. Other regions, such as in the United States, play the game by combining two decks of cards. This adds another dynamic to the game due to the extra number of similar type cards. Beyond that, most of the other rules followed by United States players are similar to those which are observed in the Liaoning province.
Acey-deucey is a variant of backgammon. Since World War I, it has been a favorite game of the United States Navy, Marine Corps, and Merchant Marine. Some evidence shows that it was played in the early 1900s aboard U.S. Navy ships. The game is believed to be rooted in the Middle East, Greece, or Turkey, where there were variants in which the game started with pieces off the board.
Compared to standard backgammon, acey-deucey is more like a race than a strategy game. It features a differing starting position, opening play, and rules for the endgame. Because pieces may be retained in one's opponent's home board, the game offers substantial opportunities for backgame play.
The components of acey-deucey match those of backgammon, including identical boards, number of pieces, and dice. Unlike standard backgammon, all of both players' pieces are off the board when the game begins. Acey-deucey does not use the doubling cube.
The initial play is markedly different from that of standard backgammon. Pieces are entered onto the opponent's inner board as if they were on the bar. Once a piece has been entered, it can be moved even though other pieces haven't been entered. One strategy in the game is to keep one man, called an "Oscar", off the board until it is needed for defensive purposes.