These digits are not just good friends, not even just best friends. That’s a relative term, after all, not an absolute term. These digit pairs aren’t just best friend, they’re inseparable. Just try it: you’ll break the puzzle!
Rules:
Normal Sudoku rules apply.
Digits outside the grid are adjacent in some order in that row or column.
Cells separated by a white dot contain consecutive digits. Not all dots are given.
Estimated difficulty: 3 out of 5
Solve on SudokuPad