sevens, and losing even one trick will set the bidder. When a bid of "sevens" wins the contract, all players reveal their dominoes face-up and order them from sevens to maximum-away. Dominoes must be played in this order by all players. An even less common version of Sevens is looper, where the bidder takes it for less than 42 points (one mark) and can lose a trick. Looper is not widely played and is rarely allowed by legitimate 42 players. Stacking In some houses of play, no stacking of dominoes is allowed regardless of the winning bid. In others, a bid of one mark entitles the contract-winning team to stack the won tricks in two stacks of equal height, where a bid of two or more marks entitles them to stack the won tricks in a single stack. Variations 84, a variant played with two sets of dominoes. Play usually consists of six to eight players. Some of the terminology also differs, such as bidding "pistol" instead of "nello". 72, a variant played with two sets of dominoes, blanks removed. Play usually consists of four players. Each player gets 10 dominoes, the starting bid is 40. The two remaining dominoes, known as "The Widow", goes to whoever gets the bid. That person must then throw away two dominoes, though they are not allowed to throw away trumps or count. If this can't be avoided, any count goes to the other team, and any trump that is thrown out must be turned face up. Shoot the Moon is another variant. It is played with 3 people, no teams. In this game, no domino has a special value, and all tricks remain worth one point. The game is played by removing all of the blank dominoes except for the double blank. Each player draws 7 dominoes leaving one that is set aside. The player who wins the bid has the option of trading any one of their dominoes for the one not chosen. If a player is denied the possibility of winning, or set, then they instead lose the amount they bid from their total. The game is played to 21 points, and the minimum bid is 4. The name of the game comes from "shooting the moon." If a player states during the bidding phase that they will shoot the moon, then they must catch all tricks. Doing so is worth