Dominoes is, for all intents and purposes, a board game. The word can also be used to refer to the game pieces, also called stones, which are rectangular in shape - a parallelepiped, in fact -, with small dots on one of their surfaces, painted or perforated, the number of which equals their value. Each stone has two values, most commonly from zero to six, which divide its surface in half. The pieces make all possible combinations with these values, including two equal values, without repeating themselves, resulting in 28 pieces.
There are sets that go up to the number 18, that is, with 190 stones. Basically, the game consists in combining pieces starting from the points with equal values (zero with zero, one with one, and so on), differing in the way points are counted and even the number of participants, usually four. Dominoes is conventionally said to be a Sino-European game, as it originated in China but became popular in Europe. So much so that in Asia Mahjong, an even more complex variation of the game, is the most popular, while the name " dominoes " is said to have originated from the European priests who celebrated their victories with the Latin term "domino gratias " ("thanks to the Lord").