Easy Hyper Sudoku
New to Hyper 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 Hyper 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 Hyper Sudoku before, or those who prefer a relaxed, confidence-building experience.
Difficulty overview
About Hyper / Windoku
Hyper Sudoku (also called Windoku) adds four extra shaded 3×3 regions to the standard grid. These regions overlap with the normal boxes and must each contain every digit 1–9, just like the standard boxes. The extra constraint can dramatically reduce candidate counts and often makes puzzles easier than they first appear.
Solving Techniques for Easy Level
| Technique | Description | Level |
|---|---|---|
| Region Overlap Analysis | Each Hyper region overlaps with two standard 3×3 boxes. Any digit placed in the standard box cells within a Hyper region also constrains the full Hyper region. | Beginner |
| Extended Naked Singles | With 13 regions total (9 standard boxes + 4 Hyper), naked singles appear far more often than in classic Sudoku. | Beginner |
Ready to go deeper? Try Medium Killer Sudoku to unlock Intermediate techniques.