4 ms·
At some point before 1985, an algorithm was found that could solve it in 21 "twists". (Just checked in my old copy of Hofstadter's Metamagical Themas.)
by 505 10y ago
At some point before 1985, an algorithm was found that could solve it in 21 "twists". (Just checked in my old copy of Hofstadter's Metamagical Themas.)
- BurningFrog 10y agoThis is not true. Back in those days the best known method needed 52 moves (Thistlethwaite).