Killer Sudoku is an enjoyable twist about the vintage sudoku for those of you in search of some thing new and demanding. It’s also recognized by such names as sumdoku, addoku and sumoku puzzle but in a very nutshell it’s pretty much the same selection puzzle.???? ??? ???? ????? ???? ?? ????? ???? ????. ???? ???? ?? ????? ??? ???? ??? ???? ????.