Sometimes I wish I hadn’t used “Every Other” in so many puzzle titles already, because Parity Lines are very deserving of the appellation. This puzzle was inspired by thoughts about odd and even digits, and how many of each are found within the standard set of Sudoku digits, so I thought of it as an “Every Other” puzzle until it came time to choose a title, at which point all creativity left me.
Rules:
Normal Sudoku rules apply.
Digits along hollow red parity lines alternate between even and odd.
Cells separated by a white dot contain consecutive digits. In cells separated by a black dot, one digit is double the other. Not all possible dots are given.
Estimated difficulty: 1 out of 5
Solve on SudokuPad