Easy Irregular Sudoku
New to Irregular Sudoku? Easy puzzles are designed to teach the core constraint with minimal complexity. Each puzzle uses simpler configurations so you can focus on understanding the rule before anything else.
What to expect at Easy level
Easy Irregular Sudoku puzzles are calibrated so the variant constraint alone is often enough to reveal cells directly. You'll rarely need to look beyond a single unit at a time. Mistakes are easy to catch because the constraint violations are obvious.
Recommended for players who have never tried Irregular Sudoku before, or those who prefer a relaxed, confidence-building experience.
Difficulty overview
About Jigsaw Sudoku
Jigsaw Sudoku (also called Irregular Sudoku) replaces the nine standard 3×3 boxes with nine irregular jigsaw-shaped regions. Each region still contains nine cells and must still contain every digit 1–9 exactly once. The rows and columns rules remain unchanged. The irregular shapes can create very different solving paths from classic Sudoku.
Solving Techniques for Easy Level
| Technique | Description | Level |
|---|---|---|
| Region Identification First | Identify all 9 irregular regions by their colour coding before solving. Region membership determines the third constraint unit for each cell. | Beginner |
Ready to go deeper? Try Medium Killer Sudoku to unlock Intermediate techniques.