Learning to Color

Normal Sudoku rules apply. Place the digits 1-9 in each row, column and box without repetition.

Clone Regions: Shaded boxes act as extra regions that do not repeat digits in the given box, and also as clones where each digit is in the same position in each shaded region.

Little Killer: Clues outside the grid with an arrow are the sum of the digits in the cells along the indicated diagonal. Digits may repeat along these diagonals if allowed by other rules.