Concentration
Concentration is generally played by two players. The bones are placed face down on the table, shuffled by one, both, or all players and then arranged in a simple rectangular grid. For double-six dominoes, for example, the 28 bones would be placed in four rows of seven bones each.
The goal of play is to collect pairs of bones. The player who collects the most pairs wins the game. With double-six dominoes, pairs consist of any two bones whose pips sum to 12. For example, the 3-5 and the 0-4 form a pair. In some variations, doubles can only form pairs with other doubles so that the 2-2, for example, can only be paired with the 4-4.
Players, in turn, try to collect pairs by turning over and exposing the faces of two bones from the grid. If the four faces of the two bones sum to 12, the player takes the two bones, scores a point (in some rules a point for each bone taken), and plays again. If the tally is any other number, the bones are turned face down again and the player's turn is over.
The first player to accumulate 50 (or 100) points wins the series.
The origin of dominoes
Dominoes are descendants of dice. The two ends on each of the original Chinese dominoes represented one of the 21 combinations that can occur with the throw of two dice. Modern western dominoes, however, have blank ends on them as well and so the number of dominoes is generally 28. Dominoes were apparently unknown in Europe until the 18th century and may have been invented in their modern form in Italy. The dark spots on light faces apparently reminded people of masquerade masks with eyeholes (called dominoes) and thus gave the playing pieces their name. Chinese dominoes do not have blanks, but some whole tiles are duplicated..
Other uses of dominoes
Other than playing games of strategy, another common pastime using domino tiles is to stand them on edge in long lines, then topple the first tile, which falls on and topples the second, etc., resulting in all of the tiles falling. Arrangements of thousands of tiles have been made that have taken several minutes to fall. By analogy, similar phenomena of chains of small events each causing similar events leading to eventual catastrophe are called domino effects.
See also
Rules of domino games, Chinese dominoes, domino effect, polysquares, tetromino, tilings
References
- Hoyle's Rules of Games 3rd Ed. (2001). Hoyle, Edmond, Mott-Smith, Geoffrey, & Morehead, Philip, & Morehead, A. H. (Eds). Signet. ISBN 0451204840
External links
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