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  1. Apr 2023
    1. The first major insight on God’s Number was by Dr. Morwen Thistlethwaite in 1981, who proved it was at most 52. That means he proved every scrambled cube can be solved in 52 moves or less.Progress continued through the 1990s and 2000s. Finally, in June 2010, a team of four scientists proved that God’s number is 20.

      With respect to the Rubic's Cube, God's number is defined as the minimum number of turns to solve a randomly scrambled cube. Morwen Thistlethwaite proved that it was at most 52 moves in 1981. By June 2010 a group of four had a proof that God's number is 20.