Expert Mini Sudoku (4×4)
4
3
2
1
4
How to play Mini Sudoku
Fill each row, column, and 2×2 box with the digits 1, 2, 3, and 4 - Each appearing exactly once.
About Mini Sudoku
Difficulty
★☆☆☆☆
1/5
Constraint Type
Smaller Grid
Typical Givens
4–8
Avg. Solve (Medium)
2 min
Mini Sudoku uses smaller grids: the popular 4×4 version uses digits 1–4 in four 2×2 boxes, and the 6×6 version uses digits 1–6 in six 2×3 boxes. The rules are identical to standard 9×9 Sudoku but scaled down. Mini Sudoku is ideal for introducing children to Sudoku logic, for quick puzzle sessions, or as a warm-up before tackling larger grids.
Solving Techniques
| Technique | Description | Level |
|---|---|---|
| Direct Scanning | With only 16 cells and digits 1–4, scan each row, column, and 2×2 box for missing digits. Most easy puzzles resolve in a single pass. | Beginner |
| Single Candidate | If only one cell in a row, column, or box can hold a particular digit, place it immediately. | Beginner |
| Box–Row/Column Interaction | Each 2×2 box shares all four cells with exactly two rows and two columns. Every box placement simultaneously restricts two full rows and two full columns. | Beginner |
Average Solve Time by Difficulty
Easy
1 min
Medium
2 min
Hard
4 min
Expert
6 min