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Variation of Sudoku rules: Insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region.

Every given clue is lying. The correct value is either one more or one less than the given clue. (1 clues cannot become 0, and 9 clues cannot become 10.)

For automatic solution checking, the numbers must be entered in green, blue, or red.
CTRL + z CTRL + y Erase elements that belongs to the selected mode Erase problem or solution grid

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