These cages are the color of “German Whispers” lines as a reminder that each cage functions as just such a line. Even the two-cell cages function as if they were two-cell green lines. Imagine that they’re green lines, but I’ve helpfully provided the total for all of the digits along the line.
Rules:
Normal Sudoku rules apply.
Digits within cages do not repeat, and sum to the total in the top-left corner of the cage, if given.
Also, adjacent digits within cages differ by at least five.
Estimated difficulty: 1.5 out of 5
Solve on SudokuPad