Normal sudoku rules apply. Each arrow indicates that the sum of the odd digits must equal the sum of the even digits in the first x cells seen in the direction of the arrow where x is the digit in the cell next to the clue.
Normal sudoku rules apply. Each arrow indicates that the sum of the odd digits must equal the sum of the even digits in the first x cells seen in the direction of the arrow where x is the digit in the cell next to the clue.