The Rubik’s Cube, widely considered the best-selling toy in the world, turns 40 today, and to celebrate, Google has put up a virtual version of the much-absorbing 3D puzzle on its homepage.
The doodle on the internet giant’s homepage features an interactive model. The goal is, as with the real-life physical version of the toy, to successfully align the nine smaller cubes, or “cubelets” (or also “cubies”) as they are known, of the same colour to the same side.
In the game's online version, players can use interactive keys or click and drag the boxes and the sides to rotate and align the cubes. As with the classic Rubik’s Cube, each of the six sides is divided into nine squares, each of one of six colours: red, blue, green, yellow, white and orange. A counter on the side shows the numbers of moves taken to work on the puzzle.
The 3D puzzle was invented by Hungarian sculptor and architecture professor Ernő Rubik in 1974. It was released as a toy in Hungary in 1977, and worldwide in 1980.
There have been several competitions across the world in which people try to aim for the fastest time to solve the puzzle. Three of fastest times recorded have been achieved by robots, at 15 seconds, 10 seconds, and the fastest yet: 3.253 seconds by a Lego robot.
The fastest human record was set by Mats Valk of the Netherlands at 5.55 seconds in 2013.
After May 19, the doodle will become part of the Google doodle archive.