Easy Diagonal Sudoku
New to Diagonal 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 Diagonal 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 Diagonal Sudoku before, or those who prefer a relaxed, confidence-building experience.
Difficulty overview
About Diagonal Sudoku
In Diagonal Sudoku, the standard 9×9 rules apply — but with one powerful extra constraint: both main diagonals (top-left to bottom-right, and top-right to bottom-left) must each contain every digit from 1 to 9 exactly once. This extra constraint typically makes the puzzle easier to solve since diagonals act as two extra units for elimination.
Solving Techniques for Easy Level
| Technique | Description | Level |
|---|---|---|
| Diagonal as a Unit | Treat each diagonal exactly like a row or column — every digit 1–9 appears exactly once. Standard scanning and counting apply. | Beginner |
Ready to go deeper? Try Medium Killer Sudoku to unlock Intermediate techniques.