Mini Sudoku
4×4 or 6×6 grids — perfect for beginners and children
Mini Sudoku is fully playable. Choose a difficulty and start solving.
A 4×4 grid using digits 1–4, with 2×2 boxes standing in for the usual nine. The reasoning is identical to the full game at a fraction of the size — most grids fall inside five minutes. The ideal warm-up, teaching tool, or coffee-break solve.
For the complete rules, worked examples and solving techniques, read the full How to Play Mini Sudoku guide.
Like all Sudoku variants, Mini Sudoku builds on the classic 9×9 foundation. Every row, column, and 3×3 box must contain each digit from 1 to 9 exactly once. The variant constraint is added on top of these standard rules, never replacing them.
If you're new to Sudoku, start by learning the basic rules and techniques before attempting variants.
Techniques Useful for This Variant
| Technique | How it applies |
|---|---|
| Pencil Marks / Notes | Essential for tracking candidates alongside the variant constraint |
| Obvious Singles | Cells narrowed to one candidate by the combined constraints |
| Hidden Singles | Digits with only one valid cell in a unit after variant elimination |
| Pairs and Triples | Locked candidates exposed by the additional constraint |