Easy Between Lines Sudoku
New to Between Lines 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 Between Lines 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 Between Lines Sudoku before, or those who prefer a relaxed, confidence-building experience.
Difficulty overview
About Between Lines Sudoku
Between Lines Sudoku draws lines with circular endpoints. Every digit along the line (excluding the endpoints themselves) must be strictly greater than the smaller endpoint and strictly less than the larger endpoint. If the endpoints are 2 and 8, every middle cell on the line must be one of 3, 4, 5, 6, or 7. The closer the endpoints are in value, the more constrained the middle cells.
Solving Techniques for Easy Level
| Technique | Description | Level |
|---|---|---|
| Endpoint Gap Analysis | The gap between endpoint values must be large enough to accommodate all middle cells. If endpoints are 2 and 8, middle cells must come from {3,4,5,6,7}. | Beginner |
| Endpoint Ordering | The endpoint values have no fixed order — the constraint is that all middle cells are strictly between the minimum and maximum endpoint. | Beginner |
Ready to go deeper? Try Medium Killer Sudoku to unlock Intermediate techniques.