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4 Colour Sudoku Cube
Above:Solution 1
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Another 4x4x4 Sudoku but with just 4 colours.

Shortly after Sudoku became popular there were several Sudoku NxNxN's implemented and presented. The ones for the 4x4x4 used numbers from 1 to 16 as the adapted traditional rules dictates.
This variant goes a different way. It uses only 4 colours. Every side is split into 4 squares of size 2x2 each. The solved state of this puzzle therefore has a solved Super-Sudoku 4x4 (instead of 9x9) on each side. Super means that even on the diagonals no colours may appear twice.

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Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.

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