Fill each cell with a digit from 1-9. For every row 'n' and column 'n' there are exactly 'n' unique digits. The remaining cells are filled with repeats. Divide the grid into three regions. A region is an area of orthogonally connected cells. No 2x2 area may be entirely in one region. Identical digits may not appear in different regions. Adjacent digits on a green line have a difference of at least 5. No two digits anywhere on a yellow line may be consecutive (or the same). Any group of 3 adjacent cells on an orange line must contain one low digit (1, 2 or 3), one medium digit (4, 5 or 6) and one high digit (7, 8 or 9). Adjacent digits on a turquoise line always have the same difference. This difference must be determined for each turquoise line. Digits joined by an X sum to 10. A digit on a blue arrow indicates how many region borders (separating two regions) are seen in the direction of the arrow. (Region edges at the outer perimeter of the grid don't count.)