How to Play Jigsaw Sudoku
Classic Sudoku rules, but the nine 3×3 boxes are replaced with nine irregular jigsaw-shaped regions.
Try it now — Easy 9x9 →The Rules
- Each row must contain digits 1–9 exactly once
- Each column must contain digits 1–9 exactly once
- Each jigsaw-shaped region (marked by thick borders) must contain digits 1–9 exactly once
- The irregular regions replace the standard 3×3 boxes — everything else follows standard Sudoku rules
Available in 1 size (9x9) and 3 difficulty levels (easy, normal, hard).
See It in Action
Sudoku with irregular jigsaw-shaped regions instead of 3×3 boxes
How to Play
- Trace and identify each of the nine jigsaw regions by following the thick borders
- Apply standard Sudoku techniques: naked singles, hidden singles across rows, columns, and regions
- Focus on rows or columns that cross many regions — the intersections generate strong constraints
- Track which digits each region is missing and use that to eliminate candidates from crossing lines
Pro Tips
Color or mark each region differently on paper to avoid confusion about which cells belong to which region
Irregular regions can cross rows and columns in surprising ways — a digit in one region might block it in a distant row
The solving logic is identical to standard Sudoku — only the shape of the regions changes
Frequently Asked Questions
What is Jigsaw Sudoku?
Jigsaw Sudoku follows standard Sudoku rules but replaces the nine 3×3 boxes with nine irregular, jigsaw-shaped regions. Each region must still contain digits 1–9 exactly once.
Choose Your Challenge
Start with easy to learn the rules, then progress to harder difficulties.