Restoring a Rubik's cube is not the easiest task but if you want to do this in 20 moves or less the bar has been raised even higher.
Cube Explorer implements an algorithm which is capable of doing this and it finds the solution usually within fractions of a second. The program also gives the possibility to generate cubes with certain patterns or symmetries.
The 15-Puzzle is a sliding puzzle that triggered a similar hype in 1880 as Rubik's cube did exactly 100 years later.
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Jak ułożyć Kostkę Rubika - kurs układania dla początkujących
Program to Solve Your Rubik's Cube
Martin Španěl