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- Normal Sudoku Rules: Fill each row, column, and 3x3 box with the digits 1-9 once each. - Black Kropkis: Digits in cells separated by a black dot have a 1:2 ratio. NEGATIVE CONSTRAINT (no two digits which are not separated by a black dot may be in a 1:2 ratio). - Knight's Move: Cells a (chess) knight's move apart cannot contain the same digit. - Odd/Even: Digits in gray circles are odd. Digits in gray squares are even. - Disjoint Sets: Any identical local position across the nine distinct boxes forms an extra virtual group of 9 cells that also must contain the digits 1 through 9 uniquely. - Negative Diagonal: Digits along the negative diagonal (R1C1 to R9C9) must be unique.
Oddly Disjointed Constraints
By starchacer
- Normal Sudoku Rules: Fill each row, column, and 3x3 box with the digits 1-9 once each. - Black Kropkis: Digits in cells separated by a black dot have a 1:2 ratio. NEGATIVE CONSTRAINT (no two digits which are not separated by a black dot may be in a 1:2 ratio). - Knight's Move: Cells a (chess) knight's move apart cannot contain the same digit. - Odd/Even: Digits in gray circles are odd. Digits in gray squares are even. - Disjoint Sets: Any identical local position across the nine distinct boxes forms an extra virtual group of 9 cells that also must contain the digits 1 through 9 uniquely. - Negative Diagonal: Digits along the negative diagonal (R1C1 to R9C9) must be unique.