Normal sudoku rules apply. Clues at the bottom of the grid indicates the sum of the digits along the diagonal indicated by the arrow. Digit may repeat along a diagonal. Clues on the left and top of the grid indicates the sum of the digits sandwich between the 1 and the 9 in that row or column. If a clue is written as x-y it means that the real total is between those two numbers (i.e the clue in column 1 written as 0-6 means the real total is either 1,2,3,4 or 5)