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kottke.org posts about Rubik’s Cube

A Self-Solving Rubik’s Cube

posted by Jason Kottke   Sep 25, 2018

For those of us who have never quite gotten the hang of solving the popular puzzle, some wonderful genius has constructed a self-solving Rubik’s Cube. There don’t seem to be any details available about how it works, but based on the videos, it seems likely the electronics inside record the moves when the Cube is mixed up and then simply performs them in reverse. (via fairly interesting)

Update: If you read the comments at Metafilter, it appears my speculation about how the Cube works is wrong…it appears to actually be solving itself, not just reversing moves.

Teen solves Cube in under 5 seconds

posted by Jason Kottke   Nov 25, 2015

Fourteen-year-old Lucas Etter solved a randomly scrambled Rubik’s Cube in just 4.9 seconds the other day, the first time anyone has ever solved one under five seconds. As Oliver Roeder writes over at 538, Cube solve times have fallen quickly in the past decade.

In these competitions, the colorful cubes are randomly scrambled according to a computer program, and a solver has 15 seconds to inspect a cube before racing to spin it back to its organized state. The first official record - 22.95 seconds - was set at the first world championship, held in 1982 in Hungary, home country of the cube’s inventor, Erno Rubik. But speed cubing went into hibernation for two decades, until the next world championship was held in 2003. From there, the record has fallen precipitously, thanks to innovations like the Fridrich method, the Petrus system and even “cube lube.”

(via @djacobs)