Rubik's Clock

[1] The Hungarian sculptor and professor of architecture Ernő Rubik bought the patent from them to market the product under his name.

The state of each pin (in or out) determines whether the adjacent corner clock is mechanically connected to the three other adjacent clocks on the front side or on the back side: thus the configuration of the pins determines which sets of clocks can be turned simultaneously by rotating a suitable dial.

The puzzle is unique in the WCA in that it is the only puzzle for which viable speedsolving methods have been devised that always solve it in God's number moves (14 for the clock) or less; an example is "7-Simul", which involves performing seven pairs of moves on the front and back of the clock simultaneously and requires mental calculation from the puzzle's initial position to determine some moves.

The puzzle is oriented with 12 o'clock on top, and either side in front.

The following moves can be made:[2] The world record for single solve is held by Lachlan Gibson of New Zealand with a time of 1.86 seconds, set at A New Year in Auckland 2025.