Normal sudoku rules apply. Draw a loop that travels around the grid orthogonally through the centre of cells. This loop must pass through each 3x3 box at least once. No 2x2 area can fully contain loop cells and adjacent digits upon the loop must differ by at least 5. In a cage digits must sum to the total (z) in the top left corner of the cage if given. Additionally, each cage will reveal a coordinate (Row X Column Y, with X being the uppermost/leftmost digit and Y being the lowermost/rightmost digit) whereby Z must be placed. Each cage's coordinate cell must be part of the loop, and cages are allowed to reference the same cell multiple times throughout the puzzle. The given '6' cage is unique; no other cage can sum to 6!