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Classic Sudoku: Every row, column and 3x3 box must contain every number from 1 to 9. German Whispers: Every two consecutive digits along a green line must have a difference of at least 5. Kropki: Two digits separated by a white dot are consecutive; two digits separated by a black dot have a 1:2 ratio.
Pinwheel
By GiAnMMV
Classic Sudoku: Every row, column and 3x3 box must contain every number from 1 to 9. German Whispers: Every two consecutive digits along a green line must have a difference of at least 5. Kropki: Two digits separated by a white dot are consecutive; two digits separated by a black dot have a 1:2 ratio.