Dominoes

European-style dominoes are traditionally made of bone, silver lip ocean pearl oyster shell (mother of pearl), ivory, or a dark hardwood such as ebony, with contrasting black or white pips (inlaid or painted). Some sets feature the top half thickness in MOP, ivory, or bone, with the lower half in ebony. Alternatively, domino sets have been made from many different natural materials: stone (e.g., marble, granite or soapstone); other woods (e.g., ash, oak, redwood, and cedar); metals (e.g., brass or pewter); ceramic clay, or even frosted glass or crystal. These sets have a more novel look, and the often heavier weight makes them feel more substantial; also, such materials and the resulting products are usually much more expensive than polymer materials.

Dominoes

Modern commercial domino sets are usually made of synthetic materials, such as ABS or polystyrene plastics, or Bakelite and other phenolic resins; many sets approximate the look and feel of ivory while others use colored or even translucent plastics to achieve a more contemporary look. Modern sets also commonly use a different color for the dots of each different end value (one-spots might have black pips while two-spots might be green, three red, etc.) to facilitate finding matching ends. Occasionally, one may find a domino set made of card stock like that for playing cards. Such sets are lightweight, compact, and inexpensive, and like cards are more susceptible to minor disturbances such as a sudden breeze. Sometimes, the tiles have a metal pin (called a spinner or pivot) in the middle.[6]

The traditional domino set contains one unique piece for each possible combination of two ends with zero to six spots, and is known as a double-six set because the highest-value piece has six pips on each end (the "double six"). The spots from one to six are generally arranged as they are on six-sided dice, but because blank ends having no spots are used, seven faces are possible, allowing 28 unique pieces in a double-six set.

However, this is a relatively small number especially when playing with more than four people, so many domino sets are "extended" by introducing ends with greater numbers of spots, which increases the number of unique combinations of ends and thus of pieces. Each progressively larger set increases the maximum number of pips on an end by three, so the common extended sets are double-nine (55 tiles), double-12 (91 tiles), double-15 (136 tiles), and double-18 (190 tiles), which is the maximum in practice. Larger sets such as double-21 (253 tiles) could theoretically exist, but they seem to be extremely rare if nonexistent, as that would be far more than is normally necessary for most domino games even with eight players. As the set becomes larger, identifying the number of pips on each domino becomes more difficult, so some large domino sets use more readable Arabic numerals instead of pips.[7]

Dutch sailors playing dominoes, 1890s

The oldest confirmed written mention of dominoes in China comes from the Former Events in Wulin (i.e., the capital Hangzhou) written by the Yuan Dynasty (1271–1368) author Zhou Mi (1232–1298), who listed pupai (gambling plaques or tiles), as well as dice as items sold by peddlers during the reign of Emperor Xiaozong of Song (r. 1162–1189).[1] Andrew Lo asserts that Zhou Mi meant dominoes when referring to pupai, since the Ming author Lu Rong (1436–1494) explicitly defined pupai as dominoes (in regard to a story of a suitor who won a maiden's hand by drawing out four winning pupai from a set).[1]

The earliest known manual written about dominoes is the 《宣和牌譜》 (Manual of the Xuanhe Period) written by Qu You (1341–1437),[1] but some Chinese scholars believe this manual is a forgery from a later time.[8]

In the Encyclopedia of a Myriad of Treasures, Zhang Pu (1602–1641) described the game of laying out dominoes as pupai, although the character for pu had changed, yet retained the same pronunciation.[1] Traditional Chinese domino games include Tien Gow, Pai Gow, Che Deng, and others. The 32-piece Chinese domino set, made to represent each possible face of two thrown dice and thus have no blank faces, differs from the 28-piece domino set found in the West during the mid 18th century.[9] Chinese dominoes with blank faces were known during the 17th century.[10]

Many different domino sets have been used for centuries in various parts of the world to play a variety of domino games. Each domino originally represented one of the 21 results of throwing two six-sided dice (2d6). One half of each domino is set with the pips from one die and the other half contains the pips from the second die. Chinese sets also introduce duplicates of some throws and divide the tiles into two suits: military and civil.[11] Chinese dominoes are also longer than typical European ones.

The early 18th century saw the "game of domino" surfacing in Europe, appearing first in Italy, before rapidly spreading to Austria, southern Germany and France. From France, the game was introduced to England by the late 1700s,[lower-alpha 1] purportedly brought in French prisoners-of-war.[14] It appears in American literature by the 1860s and variants soon spring up. In 1889, it was described as having spread worldwide, "but nowhere is it more popular than in the cafés of France and Belgium.[15] From the outset, the European game was different from the Chinese one. European domino sets contain neither the military-civilian suit distinctions of Chinese dominoes nor the duplicates that went with them. Moreover, according to Dummett, in the Chinese games it is only the identity of the tile that matters; there is no concept of matching.[16] Instead, the basic set of 28 unique tiles contains seven additional pieces, six of them representing the values that result from throwing a single die with the other half of the tile left blank, and the seventh domino representing the blank-blank (0–0) combination. Subsequently 45-piece (double eight) sets appeared in Austria and, in recent times, 55-piece (double nine) and 91-piece (double twelve) sets have been produced.

The earliest game rules in Europe describe a simple block game for two or four players. Later French rules add the variant of Domino à la Pêche ("Fishing Domino"), an early draw game as well as a three-hand game with a pool.[17] The first scoring game to be recorded was Fives, All Fives or Cribbage Dominoes which appeared in 1863 and borrowed the features of scoring for combinations as well as the cribbage board from the card game of Cribbage. In 1864, The American Hoyle describes three new variants: Muggins, simply Fives with the addition of another Cribbage feature, the 'muggins rule'; Bergen and Rounce; alongside the Block Game and Draw Game.[18] All are still played today alongside games that have sprung up in the last 60 years such as Five Up, Mexican Train and Chicken Foot, the last two taking advantage of the larger domino sets available.[19]

Complete double-six set

Dominoes (also known as bones, cards, men, pieces or tiles), are normally twice as long as they are wide, which makes it easier to re-stack pieces after use. A domino usually features a line in the middle to divide it visually into two squares, also called ends. The value of either side is the number of spots or pips. In the most common variant (double-six), the values range from six pips down to none or blank.[20] The sum of the two values, i.e. the total number of pips, may be referred to as the rank or weight of a tile; a tile may be described as "heavier" than a "lighter" one that has fewer (or no) pips.

Tiles are generally named after their two values. For instance, the following are descriptions of a tile bearing the values two and five:

• Deuce-five
• Five-deuce
• 2-5
• 5-2

A tile that has the same pips-value on each end is called a double, and is typically referred to as double-zero, double-one, and so on.[20] Conversely, a tile bearing different values is called a single.[21]

Every tile which features a given number is a member of the suit of that number. A single tile is a member of two suits: for example, 0-3 belongs both to the suit of threes and the suit of blanks, or 0 suit.

In some versions the doubles can be treated as an additional suit of doubles. In these versions, the double-six belongs both to the suit of sixes and the suit of doubles. However, the dominant approach is that each double belongs to only one suit.[20]

The most common domino sets commercially available are double six (with 28 tiles) and double nine (with 55 tiles). Larger sets exist and are popular for games involving several players or for players looking for long domino games.

The number of tiles in a double-n set obeys the following formula:[22]

${\displaystyle {\frac {(n+1)(n+2)}{2}}}$

The total number of pips in a double-n set is found by:

${\displaystyle {\frac {n(n+1)(n+2)}{2}}}$ i.e. the number of tiles multiplied by the maximum pip-count (n)

e.g. a 6-6 set has (7 x 8) / 2 = 56/2 = 28 tiles, the average number of pips per tile is 6 (range is from 0 to 12), giving a total pip count of 6 x 28 = 168

This formula can be simplified a little bit when ${\displaystyle n}$ is made equal to the total number of doubles in the domino set:

${\displaystyle {\frac {(n)(n+1)}{2}}}$

The most popular type of play are layout games, which fall into two main categories, blocking games and scoring games.

• Most domino games are blocking games, i.e. the objective is to empty one's hand while blocking the opponent's. In the end, a score may be determined by counting the pips in the losing players' hands.
• In scoring games, the scoring is different and happens mostly during game play, making it the principal objective.[21]
• A popular version played predominantly in Singapore, referenced as Hector's Rules, allows for playing double tiles on opponents' hands and awards a bonus play of an additional tile immediately after playing a double tile.
• If an opponent lays all their tiles on their turn, the game is a tie.

Line of play

Five-Up played with multicolored tiles: The doubles serve as spinners, allowing the line of play to branch.

The line of play is the configuration of played tiles on the table. It starts with a single tile and typically grows in two opposite directions when players add matching tiles. In practice, players often play tiles at right angles when the line of play gets too close to the edge of the table.

The rules for the line of play often differ from one variant to another. In many rules, the doubles serve as spinners, i.e., they can be played on all four sides, causing the line of play to branch. Sometimes, the first tile is required to be a double, which serves as the only spinner.[21] In some games such as Chicken Foot, all sides of a spinner must be occupied before anybody is allowed to play elsewhere. Matador has unusual rules for matching. Bendomino uses curved tiles, so one side of the line of play (or both) may be blocked for geometrical reasons.

In Mexican Train and other train games, the game starts with a spinner from which various trains branch off. Most trains are owned by a player and in most situations players are allowed to extend only their own train.

Commemorative Coin of the 2011 Domino World Championship in Abkhazia

Dominoes is played at a professional level, similar to poker. Numerous organisations and clubs of amateur domino players exist around the world. Some organizations organize international competitions.

Dominoes in motion

Dominoes waiting to fall

Besides playing games, another use of domino tiles is the domino show, which involves standing them on end in long lines so that when the first tile is toppled, it topples the second, which topples the third, etc., resulting in all of the tiles falling. By analogy, the phenomenon of small events causing similar events leading to eventual catastrophe is called the domino effect.

Arrangements of millions of tiles have been made that have taken many minutes, even hours to fall. For large and elaborate arrangements, special blockages (also known as firebreaks) are employed at regular distances to prevent a premature toppling from undoing more than a section of the tiles while still being able to be removed without damage.

The phenomenon also has some theoretical relevance (amplifier, digital signal, information processing),[27] and this amounts to the theoretical possibility of building domino computers.[28] Dominoes are also commonly used as components in Rube Goldberg machines.

The Netherlands has hosted an annual domino-toppling exhibition called Domino Day since 1986. The event held on 18 November 2005 knocked over 4 million dominoes by a team from Weijers Domino Productions. On Domino Day 2008 (14 November 2008), the Weijers Domino Productions team attempted to set 10 records:[29]

1. Longest domino spiral (200 m)
2. Highest domino climb (12 m)
3. Smallest domino tile (7 mm)
4. Largest domino tile (4.8 m)
5. Longest domino wall (16 m)
6. Largest domino structure (25,000 tiles)
7. Fastest topple of 30 metres of domino tiles (4.21 sec, time by Churandy Martina: 3.81 sec)
8. Largest number of domino tiles resting on a single domino (1002 tiles) for more than 1 hour
9. Largest rectangular level domino field (1 million tiles)
10. A new record of 4,345,027 tiles

This record attempt was held in the WTC Expo hall in Leeuwarden. The artist who toppled the first stone was the Finnish acrobat Salima Peippo.

At one time, Pressman Toys manufactured a product called Domino Rally that contained tiles and mechanical devices for setting up toppling exhibits.

In Berlin on 9 November 2009, giant domino tiles were toppled in a 20th-anniversary commemoration of the fall of the Berlin Wall. Former Polish president and Solidarity leader Lech Wałęsa set the toppling in motion.

A 2-1 tile is used in the logo of pizza retailer Domino's Pizza.

Since April 2008,[30] the character encoding standard Unicode includes characters that represent the double-six domino tiles in various orientations. All combinations of blank through six pips on the left or right provides 49 glyphs, the same combinations vertically for another 49, and also a horizontal and a vertical "back" for a total of 100 glyphs. In this arrangement, both orientations are present: horizontally both tiles [1|6] and [6|1] exist, while a regular game set only has one such tile. The Unicode range for dominoes is U+1F030–U+1F09F. The naming pattern in Unicode is, by example, U+1F03B 🀻 DOMINO TILE HORIZONTAL-01-03. Few fonts are known to support these glyphs.[31] While the complete domino set has only 28 tiles, for printing layout reasons, the Unicode set needs both horizontal and vertical forms for each tile, plus the 01-03 (plain) 03-01 (reversed) pairs, and generic backsides.

• Col. Henry T. Titus vs. Capt. Clark Rice for the naming of Titusville, Florida.[32]

The domino players by Friedrich Sturm

Domino games

• Glossary of domino terms
• List of domino games
• Chinese dominoes

Other related articles

• Domino theory
• Polyominoes
• Pub games
• Tile-based game
• List of world championships in mind sports

• This article incorporates text from the public domain 1911 Encyclopædia Britannica.

• _ (1889). Chambers's Encyclopaedia. London & Edinburgh: Chambers; Philadelphia: Lippincott.
• Carlisle, Rodney P. (2009). Encyclopedia of Play in Today’s Society. Vol. 1. LA: Sage.
• “Trumps” (1864). The American Hoyle. Dick & Fitzgerald, New York.
• Pickover, Clifford A. (2002). The Zen of Magic Squares, Circles, and Stars. Princeton: Princeton University Press. ISBN 0-691-11597-4.
• "Richard" (1865). Académie des jeux: contenant la règle de chacun des principaux jeux. Paris: Bernardin-Bechet.
• Sheridan, Thomas (1797). A Complete Dictionary of the English Language, Volume 1. London: Dilly.

Media related to Dominoes at Wikimedia Commons

• Dominoes at Curlie