Normal 6x6 sudoku rules apply. (ie place the digits 1-6, once each, into every row, column and box.) Draw 6 lines, each with a different turquoise spot at both ends. Each line must occupy at least 3 cells, and may move orthogonally and diagonally. Lines may not branch, cross each other, or share cells. Each line is a 'same difference' line ie Every pair of adjacent cells along a line has the same difference - this is its 'difference value.' Every line has a different 'difference value'. Digits in a cage sum to the total given in the cage’s top left corner.