Put the digits 1-3 twice each and the digits 4-6 once each in every row, column and 3x3 box. Cells separated by a king's move (in chess) cannot contain the same digit. Digits in the cage sum to the small clue in the top left corner of that cage.
Put the digits 1-3 twice each and the digits 4-6 once each in every row, column and 3x3 box. Cells separated by a king's move (in chess) cannot contain the same digit. Digits in the cage sum to the small clue in the top left corner of that cage.