These digits aren’t looking to socialize. Next-door neighbors, or maybe one door further down, that’s it. No need to get to know anybody beyond that. Near neighbors only!
Rules:
Normal Sudoku rules apply.
Consecutive digits on red/pink lines differ by at most two.
Digits in cells marked with a green square are even.
Digits in cells marked with an orange circle are odd.
Estimated difficulty: 1.5 out of 5
Solve on SudokuPad