Consecutive Sudoku
Bars between cells mean those two digits are consecutive
Consecutive Sudoku is fully playable. Choose a difficulty and start solving.
White bars flag every neighbouring pair whose digits differ by exactly 1 — and the absence of a bar promises the pair is not consecutive. Bar chains force runs of touching values through the grid. The negative information is the real engine here.
For the complete rules, worked examples and solving techniques, read the full How to Play Consecutive Sudoku guide.
Like all Sudoku variants, Consecutive Sudoku builds on the classic 9×9 foundation. Every row, column, and 3×3 box must contain each digit from 1 to 9 exactly once. The variant constraint is added on top of these standard rules, never replacing them.
If you're new to Sudoku, start by learning the basic rules and techniques before attempting variants.
Techniques Useful for This Variant
| Technique | How it applies |
|---|---|
| Pencil Marks / Notes | Essential for tracking candidates alongside the variant constraint |
| Obvious Singles | Cells narrowed to one candidate by the combined constraints |
| Hidden Singles | Digits with only one valid cell in a unit after variant elimination |
| Pairs and Triples | Locked candidates exposed by the additional constraint |