Jigsaw Sudoku
Jigsaw Sudoku, also known as irregular or squiggly sudoku, replaces square boxes with nine-cell regions.
Jigsaw Sudoku
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Keyboard: 1–9 enter · arrows move · N notes · Backspace clear · Ctrl+Z undo
How to Play Jigsaw Sudoku
- Fill each row and column with the digits 1 to 9 exactly once.
- Instead of square 3×3 boxes, use the nine outlined irregular regions.
- Each irregular region contains nine cells and must also contain 1 to 9 once.
Tips for Solving
- Trace the region boundary before checking a candidate.
- Look for digits restricted to one row or column within a region.
- Use notes at the edges of irregular regions to avoid overlooking connected cells.
Frequently Asked Questions
Is Jigsaw Sudoku free to play?
Yes. Every Jigsaw Sudoku puzzle on Sudoku Shrine is free in your browser, with no account or download.
Does every Jigsaw Sudoku puzzle have one solution?
Yes. Each puzzle is checked by a solver so it has exactly one solution and can be solved by logic alone.
Which difficulty should I start with?
Start with Easy to learn the layout, then move to Medium and Hard once scanning and notes feel natural.
Is my progress saved?
Yes. Your entries and notes are saved in this browser, so you can close the page and continue later.