Killer Sudoku

Play Killer Sudoku or Sumdoku. Fill the grid with the numbers 1 to 9, such that every row, column and self-discipline incorporates every quantity solely as shortly as. Moreover, a Killer Sudoku grid is lower up into cages, every cage has its non-public background shade. The values of the cells in a cage must sum as rather a lot as the whole for that cage, confirmed contained in the cage's prime left nook. The an an identical quantity can not seem in a cage bigger than as shortly as.