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Doctor Skewb
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A slices-turn-only Mixup Master Skewb. It has 4 possible twists with steps of 30 each.

This puzzle was inspired by the Master Skewb and the Mixup Cube. The puzzle has the shape and appearance of the first one but allows moves like the last one. The original Mixup Cube is a hybrid puzzle of a equator-like puzzle and a 3x3x3. Due to mechanical reasons the Doctor Skewb allows only slice moves. That means the corners and faces stay fixed and never change their relative position.
The puzzle has four slices of 12 pieces each and allows 30-twists on all 4 slices. All moveable pieces are mechanically identical. Only their outer shape is different. Another precondition for these moves is the puzzle to be fudged which means there are small gap between the parts. These gaps again allow the pieces to change their orientation respective to each other since the slices are not perfectly plane.
All these requirements again prevent the puzzle to allow the moves of a Master Skewb.
The idea was conceived one year before its final presentation. The community could virtually see the design growing during this one year.
Before the finish this project was labeled with a more descriptive name: "Slice-turn-only Mixup Master Skewb".
The puzzle has an edge length of 60mm and weighs 58.2 grams.

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Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann, Carl N. Hoff. If you have any information or images that you would like to contribute to this entry, please click the apropriate add () or edit () icon above, or use the following links to modify this item, add a recent sale price or to add a new link.

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