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,
42 (dominoes) pass, the dominoes are reshuffled and the hand restarts, or in some variations, the dealer must bid 30. The 42 points consist of one (1) point for each of the seven tricks, plus 35 points from the five "count" dominoes whose total pips are a multiple of 5 (the 6-4 and double-5 for 10 points each, as well as the 4-1, 3-2, and 5-blank for 5 points each). The reward for attaining the bid is typically a tally mark, or in numerical scoring, the reward is the point total the player bid in a race to 250. The bids can