Normal sudoku rules apply. Placing correct digits may reveal fog somewhere in the grid. Cells that are a knight's move (in chess) apart may not contain identical digits. Cells connected with a gray circle contain digits that are consecutive or in a 1:2 ratio (or both). Box borders divide blue lines into segments with the same sum. Different blue lines can have different sums.
If you prefer to play directly in sudokupad then click below.
