Normal 4x4 sudoku rules apply (1-4 appear in each row, column and 2x2 box). Arrows indicate the sum of the digits along the indicated diagonal. Digits may repeat if allowed by other rules.
Normal 4x4 sudoku rules apply (1-4 appear in each row, column and 2x2 box). Arrows indicate the sum of the digits along the indicated diagonal. Digits may repeat if allowed by other rules.