Normal sudoku rules apply. Clues outside the grid indicate that that clued digit X has to be placed in the Nth cell in the corresponding direction, where N is the digit placed in the first cell in that direction and N will always refer to the first occurrence of X. The arrow determines the diagonal direction of the clue AND once it hits the edge of the grid, it reflects at 90 degrees and continues until it hits the next edge at which it stops (so there are always nine possible cells for each clue). Eg if r1c5 was a 6 then r6c2 would be a 5. Any set of three sequential cells along a beige line must contain a low (123), middle (456), and high (789) digit. Any set of three sequential cells along a blue line must NOT contain a low (123), middle (456), and high (789) digit.