This article is from the Puzzles FAQ, by Chris Cole chris@questrel.questrel.com and Matthew Daly mwdaly@pobox.com with numerous contributions by others.

How do you quickly solve Rubik's clock?

competition/games/rubiks/rubiks.clock.s

Solution to Rubik's Clock

The solution to Rubik's Clock is very simple and the clock can be

"worked" in 10-20 seconds once the solution is known.

In this description of how to solve the clock I will describe

the different clocks as if they were on a map (e.g. N,NE,E,SE,S,SW,W,NW);

this leaves the middle clock which I will just call M.

To work the Rubik's clock choose one side to start from; it does

not matter from which side you start. Your initial goal

will be to align the N,S,E,W and M clocks. Use the following algorithm

to do this:

[1] Start with all buttons in the OUT position.

[2] Choose a N,S,E,W clock that does not already have the

same time as M (i.e. not aligned with M).

[3] Push in the closest two buttons to the clock you chose in [2].

[4] Using the knobs that are farest away from the clock you chose in

[2] rotate the knob until M and the clock you chose are aligned.

The time on the clocks at this point does not matter.

[5] Go back to [1] until N,S,E,W and M are in alignment.

[6] At this point N,S,E,W and M should all have the same time.

Make sure all buttons are out and rotate any knob

until N,S,E,W and M are pointing to 12 oclock.

Now turn the puzzle over and repeat steps [1]-[6] for this side. DO NOT

turn any knobs other than the ones described in [1]-[6]. If you have

done this correctly then on both sides of the puzzle N,S,E,W and M will

all be pointing to 12.

Now to align NE,SE,SW,NW. To finish the puzzle you only need to work from

one side. Choose a side and use the following algorithm to align the

corners:

[1] Start with all buttons OUT on the side you're working from.

[2] Choose a corner that is not aligned.

[3] Press the button closest to that corner in.

[4] Using any knob except for that corner's knob rotate all the

clocks until they are in line with the corner clock.

(Here "all the clocks" means N,S,E,W,M and any other clock

that you have already aligned)

There is no need at this point to return the clocks to 12

although if it is less confusing you can. Remember to

return all buttons to their up position before you do so.

[5] Return to [1] until all clocks are aligned.

[6] With all buttons up rotate all the clocks to 12.

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