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) to reach seven "marks" or 250 points. The game consists of a number of hands (a maximum of 13 hands when playing for marks). Before each hand, and based on the seven dominoes drawn by each player, the first person clockwise from the dealer will either pass or bid in order to win the right to choose the trumps and style of play for that hand. Typically, the bidder determines what to bid by estimating how many of the forty-two (42) total points the team will win based on those seven dominoes. The minimum bid is 30. If all players