Sudoku | Fill the grid with the digits 1-9 so that no row/column/3x3box contains repeated digits. |
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Diagonal | Along a marked diagonal, digits cannot repeat. |
German Whispers | Adjacent digits along green lines have a difference of at least 5. |
Kropki |
Cells separated by a black dot contain values in a 1:2 ratio.
Not all dots are given (i.e., there are no negative constraints). |
Solution code: Row 4 and row 6