You'll Know It When You See It
- Whisper lines
The brief
Standard sudoku rules apply: each row, column, and 3x3 box must contain all the digits from 1 to 9.
Whisper-5: adjacent digits on a green line must differ by at least 5.
N-Mates: a digit in a cell with an arrow gives the distance (in the direction of the arrow) to another cell. The sum of the digits in the two cells (N) is the same for all N-Mates clues in the grid. The value of N is to be determined by the solver.