Normal sudoku rules apply. In graves (cages), digits must sum to the day, month or year of the date of the day before or after the date on the grave. Digits cannot repeat within graves. Escape the graveyard by carefully plotting an orthogonally connected path between the green and red cells. The path may not cross the highest or lowest digits in a grave. All dates use the international standard Gregorian calendar in the DD/MM/YY format.