Dominoes 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, double-12,
Chicken foot (game) is to have the lowest score by the end of the last round. For each round, the goal is for the player to empty their hand of dominoes by playing them on the board. The dominoes are first turned face down and shuffled. Then, each player picks seven dominoes to form their hand. With more than four players, the game requires an extended set. The number of dominoes drawn can be increased when fewer players are using a larger set (for instance, four players using a double-twelve set can draw 15 dominoes). Any remaining dominoes are placed to the side,