Rainbow Sudoku is a colorful variation of classic Sudoku. The numbers are replaced by colored wooden balls. Choose a starting grid among the 100 suggested, place the balls so as to obtain a tray containing each of the 9 colors, in all the rows, all the columns and all the squares.
You can also turn any classic Sudoku into Rainbow Sudoku and you will see the world in color!
100 grids included, from easy to expert.
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