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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.
Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.
This puzzle can be found in collections of these members:
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