Normal sudoku rules apply. Digits along an arrow must sum to the digit in that arrow's circle. Digits may not repeat along a main diagonal (marked in blue). Cells separated by a (single) king's move (in chess) cannot contain the same digit.
Normal sudoku rules apply. Digits along an arrow must sum to the digit in that arrow's circle. Digits may not repeat along a main diagonal (marked in blue). Cells separated by a (single) king's move (in chess) cannot contain the same digit.