Adjunct Sudoku is just like regular sudoku but pointless and unfair.
You may only enter the smallest numerals, 1, 2, and 3.
Under no circumstances are you allowed to write 4, 5, 6, 7, 8, or 9.
When you are finished, the puzzle will be, at best, one third complete.
The experience will be disheartening, but remember: it is you who chose to play Adjunct Sudoku.