Domino rules and questions

The basic domino rules

1. Each tile has two halves showing 0 to 6 dots, called pips. A double-six set has 28 tiles. Shuffle them face down; two to four players take seven each, and the rest are the boneyard.
2. In the first hand, whoever has the double-six plays it (with two or three players, the highest double). Then, in turn, each player plays a tile with a half that matches the number at one of the two open ends of the line.
3. Can't play? In block dominoes you pass; in draw dominoes you draw from the boneyard until you can (and pass once it's empty). New to dominoes? Start with block.
4. The first player to play their last tile wins the hand and scores the pips left in the other hands (with partners, the team scores the other team's pips).
5. If nobody can play, the game is blocked (a tranque): the player with the fewest pips wins (in partners, the team with the lower total). The first to the target score, often 100 or 500, wins the game.