Normal sudoku rules apply. There is one zombie cell in every row, column, and box. There are no duplicate numbers in the zombie cells. The value of a zombie cell is the number in the cell plus 1. The value of non-zombie cells is the number in the cell. The sequence of values along a marked grey line reads the same forwards and backwards. The cell values in a cage must add up to the total shown. Cell values separated by an X sum to 10. Cell values separated by a white dot are consecutive. Cell values separated by a black dot include one that is double the other.