Normal sudoku rules apply. Draw a snake in the grid. A snake is a one-cell-wide path of orthogonally connected cells which may not touch itself orthogonally or diagonally. Arrow cells are always on the snake, and count the total amount of snake cells seen in all indicated directions (If R8C6 sees 4 cells up its column and 2 cells along the diagonal then it would be a 6). Arrow cells do not count themselves. Circle cells are the head and tail of the snake, and count the total number of snake cells in their box. Cages represent different zones which dictate how the snake functions through each zone. In the GW Zone the snake functions as a German Whisper Line, along which adjacent digits differ by at least 5. In the ENT Zone the snake functions as an Entropic Line, along which any three consecutive cells contain a low digit {1,2,3}, a medium digit {4,5,6}, and a high digit {7,8,9}. Where the snake crosses between different zones the connection doesn’t need to be either Entropic or German Whisper. Digits separated by a white dot are consecutive.