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Sliding blocks have red and white sides. From Russia.
- Inventor: Unknown
- Mechanism: Sliding Blocks
- Patents: Unknown
- Producer: Unknown
- Year: Unknown
- Original Price: Unknown
- Current Price: No Data
This puzzles is usually called "Minus Cube Puzzle" in Russian sources. It was produced in two different places: Moscow and Sverdlovsk (currently Ekaterinburg). Both variants have two-color cubes that are made of two parts (seen in the photograph). The difference was that due to slightly different schema of cubes placement within the box, the two variants have a different number of solutions.
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Thank you to the following people for their assistance in helping collect the information on this page: Carter, Geert Hellings, Aleksey.
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