Rubik's cube

[vl_mungo]

Was a cube ever developed for those with impaired vision?

[Mangetout]

Google is your friend.

(I searched for Braille Rubik Cube)

http://www.cs.cornell.edu/home/raman/phd-thesis/html/root-thesis.html

One of his first uses of Braille was to mark a Rubik’s cube. He had solved the first two layers of the cube by pointing to each square and having someone tell him the color, but the last layer was too difficult to solve in this manner. So his brother coded the cube colors in Braille. It took him four days to solve the cube the first time; later, he could solve it in under 30 seconds. Working with the Braille cube yielded interesting insights. For example, he soon realized that one color should stay unmarked, since that was easiest to identify. This point can be rephrased in terms of cues: the absence of a cue is itself a very good cue!