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Extra Region Sudoku Puzzle

Place 1 - 9 once in each row, column, 3 x 3 box, and at each position within each 3 x 3 box. The yellow colours highlights the four extra regions added over standard sudoku. For pencilmarks enter more than one number in the cell and the font size decreases.

Pick your colour skin for the sudoku player:
   Green    Blue    Yellow    Pink

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