9 Jul
2006
9 Jul
'06
8:42 a.m.
Later a number of variations on the original 3x3x3 puzzle appeared, including 4x4x4, 5x5x5, and 2x2x2. It must be quite easy to find the diameter of the last example --- does anybody know what it is?
11 if you count half turns, 14 if you only allow quarter turns. http://www.research.att.com/~njas/sequences/?q=2+X+2+X+2 +Rubik&sort=0&fmt=0&language=english&go=Search erich friedman