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Standard 9x9 sudoku rules apply. Antiknight and Antiking: Any two cells separated by a knight's or king’s move in chess cannot contain the same digit. Ratio Kropki Dots: Digits separated by a black dot have a 2:1 ratio. Not all dots are necessary given. XV: Digits separated by an X sum to 10, those separated by a V sum to 5. Not all Xs and Vs are necessarily given.
Empty Chessboard
By addie
Standard 9x9 sudoku rules apply. Antiknight and Antiking: Any two cells separated by a knight's or king’s move in chess cannot contain the same digit. Ratio Kropki Dots: Digits separated by a black dot have a 2:1 ratio. Not all dots are necessary given. XV: Digits separated by an X sum to 10, those separated by a V sum to 5. Not all Xs and Vs are necessarily given.