Medium Consecutive Sudoku
Ready to sharpen your skills? Medium Consecutive Sudoku puzzles introduce interactions between the variant constraint and classic Sudoku techniques. You'll need to combine both skill sets to progress.
What to expect at Medium level
Medium Consecutive Sudoku puzzles require you to combine the variant constraint with standard Sudoku deduction - Naked pairs, hidden singles, and unit scans. The constraint is more tightly woven into the grid, so you'll need to think a few steps ahead.
Best suited for players comfortable with Easy Consecutive Sudoku who want to build their pattern recognition.
Difficulty overview
About Consecutive Sudoku
Consecutive Sudoku marks bars between pairs of adjacent cells. A bar means the two digits in those cells differ by exactly 1 — they are consecutive. When used with the negative constraint (no bar = not consecutive), this gives information about every adjacent pair in the entire grid, creating a powerful constraint network.
Solving Techniques for Medium Level
| Technique | Description | Level |
|---|---|---|
| Negative Constraint Power | Where no bar appears, the two cells are guaranteed non-consecutive. Every unmarked adjacent edge tells you something — treat absent bars as constraints. | Beginner |
| Bar Pair Enumeration | A bar means the digits differ by exactly 1. List all valid pairs: (1,2), (2,3), …, (8,9). Use row/column context to narrow which pair fits. | Beginner |
| Consecutive Chain | Three cells connected by two bars form a run of three consecutive digits (in some order). Enumerate the 7 possible runs: {1,2,3}, {2,3,4}, …, {7,8,9}. | Intermediate |
Master these, then take on Hard Killer Sudoku to learn Advanced techniques.