Tres trenes

Two-player domino game (for a double-six set) in which players must, in each turn, add a piece into a common line of play in the centre of the table and a piece into a line of play of their own. Failure to do both steps in a turn means defeat. If all pieces are used up, the extremes of the lines of play are used to compute scores which will determine the winner.

Players start with a hand of seven pieces; in each turn they draw one piece and play out two, so that the number of available pieces for each turn shrinks during the game.

—description from the designer