[next] [prev] [up] Date: Thu, 08 Jan 81 15:15:00 -0500 (EST)
[next] [prev] [up] From: David M. Raitzin <DR@MIT-MC >
[next] [prev] [up] Subject: [no subject]

I've been reading the old mail from this mailing list, and I've
noticed some discussion on the definition of what is a single twist.
As far as I can see, the definition of a twist should be the change in
position of all the cubies in a single plane performed by a single
motion. In other words that should include a 90 degree twist, a 180
degree twist, and a twist of the middle slice (the last one can be
thought of as holding the U and D parts of the cube in place with one
hand, while moving the middle slice with the other).

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