Dominoes Dominoes Dominoes is a family of tile-based games played with rectangular "domino" tiles. Each domino is a rectangular tile with a line dividing its face into two square "ends". Each end is marked with a number of spots (also called "pips", "nips", or "dobs") or is blank. The backs of the dominoes in a set are indistinguishable, either blank or having some common design. The domino gaming pieces make up a domino set, sometimes called a "deck" or "pack". The traditional Sino-European domino set consists of 28 dominoes, featuring all combinations of spot counts between zero and six. A domino
Schläfli double six formed in this way are all in turn intersected by another line, "a". The twelve lines "a" and "b" form a double six: each line "a" has an intersection point with five of the other lines, the lines "b" for which "i" ≠ "j", and vice versa. An alternative construction, shown in the illustration, is to place twelve lines through the six face centers of a cube, each in the plane of its face and all making the same angles with respect to the cube's edges. A generic cubic surface contains 27 lines, among which can be found 36 Schläfli