Rubik's Domino is a hand-held puzzle similar to a

Rubik's Cube The Rubik's Cube is a 3-D combination puzzle originally invented in 1974 by Hungarian sculptor and professor of architecture Ernő Rubik. Originally called the Magic Cube, the puzzle was licensed by Rubik to be sold by Pentangle Puzzles in t ...

. However, it has one layer removed, making it a 2×3×3

cuboid In geometry, a cuboid is a hexahedron, a six-faced solid. Its faces are quadrilaterals. Cuboid means "like a cube", in the sense that by adjusting the length of the edges or the angles between edges and faces a cuboid can be transformed into a cu ...

. 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 Dominoes is a family of tile-based games played with gaming pieces, commonly known as dominoes. Each domino is a rectangular tile, usually with a line dividing its face into two square ''ends''. Each end is marked with a number of spots (also ca ...

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 six-colour scheme, as seen on most other

twisty puzzle A combination puzzle, also known as a sequential move puzzle, is a puzzle which consists of a set of pieces which can be manipulated into different combinations by a group of operations. Many such puzzles are mechanical puzzles of polyhedr ...

s. It has 406,425,600 potential positions and any position can be made into a solved position in 19 moves. It was registered as US Patent number on 29 March 1983 by

Ernő Rubik Ernő Rubik (; born 13 July 1944) commonly known by his nickname, "Little Man", is a Hungarian inventor, architect and professor of architecture. He is best known for the invention of mechanical puzzles including the Rubik's Cube (1974), Rubik ...

.Rubik's Domino Patent
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References

Hungarian inventions Mechanical puzzle cubes Rubik's Cube {{toy-stub