Normal sudoku rules apply. The grid is covered in fog. Correctly entered digits remove fog in surrounding cells. Cells with a grey square contain an even digit. Each line has a distinct color. Lines do not branch or cross and only move orthogonally. All lines have a length of 3 or more. The box location of each line's ends determine its type(s): 1: Ten Line 2: Renban 3: German Whisper 4: Same Difference 5: Between 6: Modular 7: Nabner 8: Region Sum 9: Entropic e.g. yellow has one end at r3c5 and the other at r7c5. It is both Renban (box 2) and Region Sum (box 8). Ten Line: The line can be broken into segments such that each sums to 10. Renban: The line contains a set of non-repeating consecutive digits, in any order. German Whisper: Adjacent digits along this line must differ by at least 5. Same Difference: Adjacent digits along this line have the same difference for all pairs. Between: All other digits along the line have values that fall strictly between those of the ends. Modular: Every group of 3 consecutive cells along the line contains a full set of remainders modulo 3: one from (1,4,7), one from (2,5,8), and one from (3,6,9). Nabner: None of the digits on the line repeat, nor are consecutive with any other digit along the line. Region Sum: Box borders break the line into segments with the same sum. Entropic: Every group of 3 consecutive cells along the line must contain a low (1,2,3), mid (4,5,6), and high (7,8,9) digit.