Normal sudoku rules apply. Each cell is either land or water. All cells of the same type must be orthogonally connected. No 2x2 area may be entirely land or entirely water. Line Types: - Renban (pink) - Digits on a pink line don't repeat, and form a consecutive sequence, but these can be arranged in any order along the line. - Nabner (yellow) - A digit on a yellow line cannot be consecutive with (or the same as) any other digit anywhere on the line. - German Whisper (green) - Adjacent digits on a green line must have a difference of at least 5. - Region Sum (blue) - Digits along a blue line must have the same total within each 3x3 box. - Parity (red) - Digits along a red line must alternate between odd and even. - Entropic (orange) - Any group of 3 adjacent digits on an orange line must contain a low digit (1, 2 or 3), a medium digit (4, 5 or 6), and a high digit (7, 8 or 9). - Palindrome (grey) - A grey line must read the same in either direction. - Same Difference (turquoise) - Each pair of adjacent digits along a turquoise line must have the same difference. ZIPPERY WHEN WET: • Any line that is completely wet (only enters water cells) loses the property of its presenting colour, and instead becomes a zipper line. Along a zipper line, each pair of digits that are the same distance from the line's central cell, sum to the digit in that centre cell. • Any line that is completely dry (only enters land cells) behaves normally, as described in the list above. It does not behave like a zipper line. • If a line is partly dry and partly wet, it retains its presenting property, but it is ALSO a zipper line as well.