Matador (domino game) number of spots), each player gets five dominoes, with the leftover dominoes set aside in an area known as the "boneyard." During play, players must connect either end of the domino line not with a matching number on either end, but one causing the two connecting ends to have a total of seven pips, i. e. a six-spot end must be connected with a one-spot one, a four-spot with a three-spot, and a two-spot with a five-spot. Doubles are placed endwise and count the same as single dominoes. Blanks are closed to play of any domino other than a "matador."
Rubik's Domino Rubik's Domino Rubik's Domino is a hand-held puzzle similar to a Rubik's Cube. However, it has one layer removed, making it a 2×3×3 cuboid. The 3×3 faces can be turned 90-degrees as normal, but the 2×3 faces can only be turned 180 degrees. Other cuboids of 2×2×n (if n is an even number) will solve like multiple dominoes at once. When only using pairs of turns, the puzzle may be solved similarly to a 3x3. The original version had white and black plastic layers. Each 3×3 face displayed a number of dots from 1–9. More recent versions use the traditional