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A 2x3x3 modified to look like a 2x2x2. It allows 90°-moves only on one of the axes, like the original puzzle it was made from.
The inventor was inspired by an incomplete predecessor: Thomas de Bruin presented the "Junior Domino" in 2007. That earlier version was incomplete because it behaved like a 2x2x2.
The new version uses an internal blocking mechanism to restrict two axis to halfturns only.
Thank you to the following people for their assistance in helping collect the information on this page: quisquidillius.
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