DOMINOES, a game unknown until the 18th century, and probably invented in Italy, played by two or more persons, usually with 28 oblong pieces, or dominoes, known also as cards or stones (called pieces or men in America), having ivory faces backed with ebony; from this backing, as resembling the cloak (usually black) called a domino (see MASKS), the name is said to be derived. Cardboard dominoes to be held in the hand are also in use. The face of each card is divided into two squares by a black line, and in each square half the value of the card is indicated by its being either a blank or marked with one or more black pips, generally up to six, but some sets run as high as double-nine.
The Block and Draw Games.—The dominoes are shuffled face downwards on the table. The lead is usually decided by drawing for the highest card, but it is sometimes held that any doublet takes precedence. The cards are then reshuffled, and each player draws at random the number of cards required for the particular form of the game, usually seven. The cards left behind are called the stock. To play a card is known technically as to pose. The leader poses first, generally playing his highest domino, since at the end the player loses according to the number of pips in the cards he has left in his hand. By some rules, a player after playing a double may play another card which matches it; e.g., if he plays double-six he may play another card which has a six at one end. The second player has to match the leader's pose by putting one of his cards in juxtaposition at one end; i.e., if the leader plays four-five, the second player has to play a card which contains either a four or a five, the five being applied to the five or the four to the four. Doublets are placed a cheval (crosswise). If a player cannot match, he says "go," and his ponent plays, unless the Draw game—the usual game—is being played, in which case the player who cannot match draws from the stock (two cards must always be left in stock) till he takes a card that matches. If a player succeeds in posing all his cards, he calls "Domino !" and wins' the hand, scoring as many points as there are pips on the cards still held by his opponent. If neither player can match, that player wins who has the fewest pips left in his hand and he scores as many points as are left in the two hands combined (sometimes only the excess held by his opponent) ; but when a player has called "Go ! " his sary must match if he can, in which case the other player may be able to match in turn. A game is generally 1 oo points: All Fives (or Muggins).—Each player takes five cards. If the leader poses either double-five, six-four, five-blank, or three-two, he scores the num ber of pips that are on the card. If in the course of play a player can play such a card as makes the sum of the end pips 5, 1o, 15 or 20, he scores that number; e.g., if to two-four he can play double-four (a cheval) he scores 1o; if to six-one he plays six-four he scores 5. He must pose if he can match; if he can not, he draws till he can. Scores are called and taken immediately. At the point of the domino, the winner scores in points the multiple of five which is nearest to the number of pips in his adversary's hand; e.g., he scores 25 if his adversary has 27 pips, 3o if he has 28. If neither hand can match, the lowest number of pips wins, and the score is taken as before, without addition or subtraction, according to the adversary's pips.
All Threes is played in the same man ner as Muggins, save that three or some multiple of three are aimed at.
Domino Whist is played by four play ers. Partners are drawn for as at whist ; the player drawing the highest domino leads. Each player takes seven cards. There are no tricks, trumps or honours. The cards are played as in ordinary dominoes, a hand being finished when one of the players plays his last card, or when both ends are blocked. Pips are then counted, and the holder or holders of the highest number score to their debit the aggregate number of points. The side that is first debited with zoo points loses the game. Strength in a suit is indicated by the lead.
Other varieties' of the game not often played are the Bergen game, Sebastopol, Domino Loo, Bingo, Tiddle-a-Wink, the Game of Four, Malakoff, Cyprus, Round the Clock and others.
See Hoffman, Card and Table Games; F. W. Lewis, Dominoes.