Dominoes are small rectangular blocks that are used in gaming. They are made from a variety of materials including bone, wood and plastic. The most common set is a double-six set, with 28 tiles. Larger sets are also available for games with more than two players.

Dominoes are used for many different games, such as solitaire, scoring, trick-taking, and layout. However, the most popular games are the ones that involve a target score. This means that the player who reaches that goal wins the game. In the case of a game involving two players, the goal is to have the highest number of points, while in a three-player game, the goal is to have the lowest score.

The most basic game of dominoes involves two players. One player starts the game by playing the first domino. The second player must then lay a tile that matches the number of pips on the first domino. Other players may also be required to replace one or more of their own tiles.

Before playing, the players will decide on a target score for the game. A score of six or seven is usually considered average, while a higher score is generally considered superior. If a player cannot reach his or her target, the other player must draw from the unused tiles.

Before playing, the player who has the heaviest hand will choose the first domino. He or she will then play it. If there is no domino in the hand, the player who is last to choose will play the next domino in the pile.

Once the initial tile is played, the next player must match the pips on one end of the domino to the number of pips on the first tile. For example, if the first domino has five pips on the left side and four pips on the right side, the player who has the heaviest right hand will play the next domino.

After the initial play, the next player may move the tiles to another line, if possible. Alternatively, he or she may add another tile to the current line. As long as the total pips of the tiles are equal, the second player can add a tile to any line, as long as the tiles are adjacent to each other and form the desired total.

When the tower falls, the game ends. However, the domino may tip over and cause the next domino in the line to do the same. Players who do not have dominoes can also draw from the unused tiles.

Another variant of the game, called concentration, is played with a double-six set. In this game, the players must have a total pip count of twelve.

A game of concentration is a more difficult version of dominoes, and it is often played with a larger set. These sets include a wide range of numbers, from 0 to 6. Double-six sets are the most common, but other large sets can include Arabic numerals instead of pips.