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Start a fresh board? Your current progress is kept in your playthroughs list.
Standard 4x4 sudoku rules apply. Kropki Dots: Digits separated by a black dot have a 2:1 ratio. Not all dots are necessarily given.
Black Kropki Tutorial
By addie
Standard 4x4 sudoku rules apply. Kropki Dots: Digits separated by a black dot have a 2:1 ratio. Not all dots are necessarily given.