Dominoes points. A running total score is often kept on a cribbage board. 5s-and-3s is played in a number of competitive leagues in the British Isles. For 40 years the game has been played by four people, with the winner being the first player to score 150 points, in multiples of five, by using 27 bones, using mathematical strategic defenses and explosive offense. At times, it has been played with pairs of partners. The double-six set is the preferred deck with the lowest denomination of game pieces, with 28 dominoes. In many versions of the game, the player with the highest
Schläfli double six double six configurations. The set of 15 lines complementary to a double six, together with the 15 tangent planes through triples of these lines, has the incidence pattern of another configuration, the Cremona–Richmond configuration. The intersection graph of the twelve lines of the double six configuration is a twelve-vertex crown graph, a bipartite graph in which each vertex is adjacent to five out of the six vertices of the opposite color. The Levi graph of the double six may be obtained by replacing each edge of the crown graph by a two-edge path. The intersection graph of the entire set