Normal Sudoku rules apply. Digits separated by a white dot are consecutive. Digits separated by a yellow dot are non-consecutive. Digits separated by a red dot must contain one even digit and one odd digit. Draw a single cable that travels orthogonally from cell to cell, never branches, crosses, or overlaps itself, and eventually closes into a loop. The cable must pass through every electricity sign and may not cross rivers (blue borders). 90-degree turns split the loop into segments (including endpoints). If a segment of length N exists, then the total number of segments of length N in the loop is M, where M is greater than 1 and M and N share the same parity. Additionally, if a segment has length N, then the digit N must appear in one of that segment’s endpoints. A digit in a purple sensor counts the number of loop cells in the 3×3 box centered on that sensor, up to a maximum of 9. Cells on the marked diagonals may not be part of any segment of length exactly 5.
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